Galileeo

I can confirm that this is true. I didn’t even know fish could even go into minecarts.

Seems to be fixed in 1.21.11 Pre-Release 2. I can’t recreate this.

Not sure if this is an intended feature, but I can confirm this is a real thing.

Yup, happens to me too.

Would it be possible for you to show us what the command you put in was?

Tried on my own client, I can confirm that this is an issue and should be fixed. Dunno how in the world you found this!

Seems to me like an issue with the file. Try deleting that asset file and trying it again.

This is vanilla tweaks yeah? That wouldn’t make it vanilla I would think.