When using the magnet if the players inventory is full items just disappear rather than being left on the ground.

Minecraft 1.21.5 with SimplyOptimized and jakes-build-tools-3.1.3.jar on server and client.

Sounds like an odd conflict! The items will normally just follow you if your inventory is full, will see if I can replicate it

Just to check, are you in creative mode when this happens?

Ooops..... Yes, they were folling me around and I didn't see them!!! I expected to see them scattered on the ground behind me.