missing collectibles don't exist

[Toastender]

Hi, I completed the game and only have the collectible missions left, however even though I have the map, the missing items are not shown, or trackable via the mission.
So I used the complete online map and video guides to check all locations again and not a single one had an item, so now I am stuck with the following items purged froim existence:
- 3 baseball cards
- 3 lighters
- 3 books
- 3 cheeseburger bobbleheads
- 4 vinyl crates

I would really appreaciate any sort of fix/ workaround as I would love to finally 100% this game...

[UbiBaron]

I'm sorry to hear you're experiencing this.

Did you join a Co-Op session at any point? I've seen some users who lost progress after joining a Session with a friend who may not have been at the same point.

Unfortunately I'm not sure there's much that can be done if the items aren't in their correct place.

- Ubisoft Support

[Toastender]

I have only played co-op in friends sessions, never on my own save. There was that bug fairly early on, unequipped all my weapons during fast travel, made me lose all ammo and consumables and only left me with the standard pistol after fast traveling in a friends co-op session, if that's related at all?