if you have any items in a triket slot and your inventory is full the items get deleated from what i can tell if a item has no ware to go when you clame a grave it gets deleated if it is not specifically supported

I'm not sure I fully understand what the problem is. Could you write down some reproducable steps? Something like:

1. put items in all vanilla inventory slots
2. equip trinkets
3. die
4. do something else?

Also I would like to know which version you're playing at. you can tell me the minecraft version if you want but all I really need is the mod version

Closing due to inactivity and lack of information. From my own testing this is not the case, so if you could reproduce it or if you find any other issue please report the issue to the github. Thanks!