When Ifri's mod is activated, it sets ALL of the characters' starting speed to 1.5 (either normal, tainted or modded characters)
I deactivated all mods except IFRI to make sure; still happens
Not sure what activates it, but take your time fixing it, i love having extra speed at the start of the game B)

Originally posted by TrappedGoblin:

When Ifri's mod is activated, it sets ALL of the characters' starting speed to 1.5 (either normal, tainted or modded characters)
I deactivated all mods except IFRI to make sure; still happens
Not sure what activates it, but take your time fixing it, i love having extra speed at the start of the game B)

Thank you for reporting this! The cause is known and I am working on a fix!

This is making all characters quickly teleport to the center of every room when changing rooms.

Originally posted by Borko:

This is making all characters quickly teleport to the center of every room when changing rooms.

Unfortunately I'm not able to recreate this issue on my end, is there any further information that you can provide to me?

It must be conflicting with a mod then. I'll try and find out which one.

playing tainted ifri in coop at all, breaks the cracked hearts system as follows, from what i've seen:
if P1 is playing tainted ifri, and P2 joins, P1's hearts go back to vanilla isaac rules.
if P2 is playing tainted ifri, they will take cracked hearts when anyone takes damage.
P3 and P4 when playing tainted ifri follow vanilla isaac rules and don't have cracked hearts at all.
I'd like to ask that until you fix this, could you put a line in the description or in this bug reporting area that says "coop with tainted ifri is bugged in general, please don't use them for coop until it's fixed" or something along those lines please?
other than that, this mod has been really fun. that bug itself actually gave me and my friend infinite money during a coop run using iv bag and pyromaniac in the mines. (23 uses of iv bag, then a full health pill or idling under a red bomb spawner)

Originally posted by Puro / Dude98 (Marcus):

playing tainted ifri in coop at all, breaks the cracked hearts system as follows, from what i've seen:
if P1 is playing tainted ifri, and P2 joins, P1's hearts go back to vanilla isaac rules.
if P2 is playing tainted ifri, they will take cracked hearts when anyone takes damage.
P3 and P4 when playing tainted ifri follow vanilla isaac rules and don't have cracked hearts at all.
I'd like to ask that until you fix this, could you put a line in the description or in this bug reporting area that says "coop with tainted ifri is bugged in general, please don't use them for coop until it's fixed" or something along those lines please?
other than that, this mod has been really fun. that bug itself actually gave me and my friend infinite money during a coop run using iv bag and pyromaniac in the mines. (23 uses of iv bag, then a full health pill or idling under a red bomb spawner)

That's something I was worried about actually. I'm looking into a fix for it and will update the bug description accordingly!

Tainted Ifri will now work properly in co-op mode no matter what player slot he is in (although there can still be only one Tainted Ifri, unless you want to share damage amongst yourselves!)
Tainted Ifri's health system has also been slightly overhauled to be less stressful on the game.
I still have some graphics to update so the update should roll out later today or sometime tomorrow.

Update is live

Originally posted by ~EternalKing~:

Tainted Ifri will now work properly in co-op mode no matter what player slot he is in (although there can still be only one Tainted Ifri, unless you want to share damage amongst yourselves!)
Tainted Ifri's health system has also been slightly overhauled to be less stressful on the game.
I still have some graphics to update so the update should roll out later today or sometime tomorrow.

that "everyone takes damage" thing, if you ever find a way to fix it, could you see if you can make that something separate (possibly a custom challenge) because that sounds really fun, even if it's not how you want them to work in coop later. i can imagine 4 players just being absolute hell.