My friend and I play on 1.18 and have been trying to keep some terrapin turtles. We pick them up in the buckets and then put them down where they cannot get out and also name them but even then they despawn after a short while. It has happened multiple times now, not sure if that is supposed to happen or not.

This should be fixed in Alex's Mobs 1.17.0. Are you using this version?

Sorry, not to be rude but I did state that we use the 1.18 version. So does that mean it is not fixed for that version?

SorrySorry, that's my bad.
I assumed it was 1.18 but I just looked and it is 1.17.1

I meant the Alex's Mobs version 1.17.0

You did not say which mod version you are using. :)

As far as I can see, the mentioned bug should be fixed since Alex's Mobs 1.17.0 for Minecraft 1.18+

Ok that is weird.^^ Maybe my PR #955 can fix this issue :)

Ah ok, I found out where the issue comes from. The "FromBucket" value is set to true here 279eb89 (since 1.17.0) but 3 lines later it is overridden by the entity data and is resetted to false. ^^

My PR #955 fixes this issue by using the vanilla logic.