The Binding of Isaac: Rebirth

The Binding of Isaac: Rebirth

SandTag Nov 22, 2024 @ 7:46am
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POST BUGS HERE! -> KNOWN BUGS (Rep+) <-
I noticed nobody had made a known issues thread, but anyway i'm going to keep a list of as many as i can think of given there's so many of them lol. More dangerous/impactful issues at the top.

As issues get fixed, i will try to update the thread to remove them.
Incase the bug list gets really long, the second post may be used to store them lol.
ALL OF THESE ISSUES RELATE TO MULTIPLAYER - Singleplayer only bugs will be marked with an SO.

#1: When players become desync'ed its possible that the hosts save data is mixed with the desynced user, if they crash their save data is permanently destroyed, or if they complete the run without gaining any new marks, it can sometimes replace the old save data when restarting the run. If a player leaves exactly as the run starts the lobby can crash and the host or anyone else left (3p+) may get a random player in the lobby's save data.

#33: Losing connection to steam, even for a few seconds, causes you to be removed from the game and lose all progress. This is unnaceptable.

#36 People joining your run after using R-key will crash the lobby and cause all completion marks earned to be lost.

#35: Worm friend causes the game to crash if it is active when the deathmatch ends

#34 The chase scene causes a wide variety of items to glitch out afterwards, keeper's birthright results in permanent health loss, lil portal can be used twice on one floor and bumbo is entirely reset back to stage 1.

#29 Vanishing twin can spawn partially indestructible segmented enemies where only the head can take damage and the body acts like a reinforced worm boss from mines/ashpit. If this occurs with solex it can cause a softlock.

#27 Open public lobbies crash or desync when players try to join during ascent, which can cause bug #1.

#28 Items and effects that are not pedestal items but create semi/permanent player following entities such as micro cell and the Spiderbaby transformation can either crash or desync the lobby.

#22: If the game crashes during the post-match bonus game no players receive any marks whatsoever and the run is falsely recorded as a loss due to incorrect timing for adding victory.

#18: Challenges/Co-op sometimes incorrectly flag mods as being loaded and either don't open or don't give marks, or the user cannot enter the daily.

#17: Sumptorium's Curse (T.Eve only): Activates for the rest of the room in co-op when only red heart containers are drained, ignoring the soul hearts and clots, resulting in permanent moms knife whilst any soul hearts are owned.

#16: Glitched items created via dataminer are active as co-op babies, this causes softlocks if the glitched item contains suplex or moms bracer as an effect.

#25 If lag spikes occur using Anim Sola on T.Jacob, Esau may be released without charging and simply float around.

#21: Transformations occurs too slowly, causing the player to die in co-op when spending their last health on it. (I.E Leviathan/Sepharim with chaos)

#2: Players cannot rejoin/reconnect to runs ATALL after crashing, instead they lose all marks for the run and are forced to select a character again, wait and then get random items.

#11: Clicker causes no completion marks to be awarded.

#20: Sharp plug does not cost hp in the deathmatch.

#4: While in greed mode, the item pool is that of standard mode, causing a myriad of useless or comically overpowered items to spawn incorrectly, such as diplopia and sharp plug.

#7: Schoolbag in multiplayer wont update to show two items are being held until after leaving the room.
You also cannot use the schoolbag at all for the current room when swapping a second active for a third one.

#8: If you have items that allow you to fit through tiny spaces, such as Pluto, its possible to cause desync by exiting rooms while they are locked.

#9: Black markets spawn in greed mode inappropriately via crawl spaces.

#10: A floor 1 confessional in greed causes unusual behaviour with the angel/devil deals on caves.
Expected: Rolls as normal as the forced deal has already occurred, it was an angel deal.
Actual: Rolls as if floor 1 deal was never activated and is a forced devil deal, does not behave in the same way as Bethany who always has a guaranteed floor 1 angel deal.

#15: Reverse wheel of fortune: Can softlock the game (needs further testing).

#19: Some controllers fail to register.

#23: a visual issue occurs with the milk familiar when using glowing hourglass, making a "ghost" milk glass appear (it does nothing).

#13: The unlock for marbles does not cause the popup message.
Last edited by SandTag; Jan 7 @ 5:21am
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Showing 1-15 of 419 comments
SandTag Nov 22, 2024 @ 7:46am 
Reserved incase list gets too long :steamfacepalm:
Locker Steve Nov 22, 2024 @ 7:49am 
3: The greed machine sometimes fails to remember coins being put in and players cannot put coins into other players machines (the coins are eaten and nothing happens).

Not only this, but if you just do a Solo run without multiplayer on your own file, the coins won't go up either.
hamnnie Nov 22, 2024 @ 7:58am 
Originally posted by Locker Steve:
3: The greed machine sometimes fails to remember coins being put in and players cannot put coins into other players machines (the coins are eaten and nothing happens).

Not only this, but if you just do a Solo run without multiplayer on your own file, the coins won't go up either.

also, i donated to unlock the Keeper and i didnt get the character even tho they gave me the achievement! idk.. now my machine is on 0 since i exploded it and i dont have keeper
Freddy Fazbear Nov 22, 2024 @ 8:14am 
Im experiencing issue 1. In my first game of online I had a crash and my save file was replaced with the one of the person i was playing with. On repentance i have gotten my old save back but no matter what i do i cant get it to work again on repentance+ it just keeps opening with the other persons save. Is there any known fixes for this yet? or am i doomed to not play online until it fixes
SandTag Nov 22, 2024 @ 8:42am 
Originally posted by Freddy Fazbear:
Im experiencing issue 1. In my first game of online I had a crash and my save file was replaced with the one of the person i was playing with. On repentance i have gotten my old save back but no matter what i do i cant get it to work again on repentance+ it just keeps opening with the other persons save. Is there any known fixes for this yet? or am i doomed to not play online until it fixes

It may be possible to load the backup saves, the game always keeps them from the previous session, im not entirely clued in on how to do it but maybe there is a video on it?

Worst comes to worse if you had dead god just use the speedrun save file.
fhr2001 Nov 22, 2024 @ 8:46am 
When you already have 2 active items (Schoolbag) and pick up a third, the picked up item cannot be used until you take damage, leave the room or re-enter the game (it happened while I was playing as tainted lazarus)
Doo ☨ Nov 22, 2024 @ 8:48am 
when i try to go online it says that i have no connection. but wifi and everything is fine, steam is online, i have installed rep+ etc.
SandTag Nov 22, 2024 @ 8:49am 
Originally posted by fhr2001:
When you already have 2 active items (Schoolbag) and pick up a third, the picked up item cannot be used until you take damage, leave the room or re-enter the game (it happened while I was playing as tainted lazarus)
Updated: It seems everything related to schoolbag is broken atm.
SandTag Nov 22, 2024 @ 9:04am 
New one: Clicker causes you to lose completion marks being awarded for the run.
Jantoregin Nov 22, 2024 @ 9:25am 
For the first bug of save data getting deleted, does that only apply to the save file you're using, or would it apply to all your save files. So could I safely play on a file i have not played on without losing data on my others?
SandTag Nov 22, 2024 @ 9:46am 
Originally posted by Jantoregin:
For the first bug of save data getting deleted, does that only apply to the save file you're using, or would it apply to all your save files. So could I safely play on a file i have not played on without losing data on my others?
Its complicated, depending on which version of the bug you get, you may be safe using a second file, but if you get the copy variation and the other person also has many saves, i think your still bricked.
emmaurilio Nov 22, 2024 @ 10:01am 
Originally posted by fhr2001:
When you already have 2 active items (Schoolbag) and pick up a third, the picked up item cannot be used until you take damage, leave the room or re-enter the game (it happened while I was playing as tainted lazarus)
yeah.. i was trying to get the forgotten while i experienced this :(
emmaurilio Nov 22, 2024 @ 10:04am 
I tried to get Marbles put when i used the 5th gulp pill i didn't get it
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Date Posted: Nov 22, 2024 @ 7:46am
Posts: 419