The sonic bow from unique dungeons (https://www.curseforge.com/minecraft/mc-mods/uniquedungeons)
Picture of sonic bow (uniquedungeons:sonic_bow):

It shoots Echo Shards.
If you shoot your tamed animal (not testing anything other than wolf and ice dragon), it will crash the game.

I have 4096 MB allocated but during runtime it seems to eat every bit of that.
In an isolated environment with just unique dungeons, citadel, and domestication innovation, the issue remains the same, but the memory is not reaching above ~2600 MB. As far as I know, this crash happens 100% of the time.
MC Version is 1.20.1

This error also occurs if you kill an ice and fire dragon with the sonic bow. Whenever you kill a dragon, it's corpse is left behind until someone loots it.
You may already know this, but bows in general will hurt tamed pets.

It might be useful to know that another mod, Friendly Fire (https://www.curseforge.com/minecraft/mc-mods/friendly-fire) does not have this issue.