Could there be a bug when the inventory is full?

I ran a few tests.
For example, I had 5 empty slots in my inventory and there were rewards of 6 turrets and 6 pistols in the /daily inventory section.
I clicked on each one individually to claim them. All clicks were successful, but only 5 turrets ended up in my inventory; the other items disappeared.
That means 1 turret and all 6 pistols vanished. I checked the /daily inventory again, and they weren't there either.
If this is a bug, could you please fix it? It would be great if you could test this, as it seems to be a serious issue.

These screenshots are another test on my other server.

I wanted to add a note to the 'InventoryDescription' section to at least make sure players are aware of this topic, but the text is still positioned incorrectly on the screen. I tried deleting and reinstalling the plugin, config, and language files, but the misalignment continues. I would appreciate your help in resolving this issue

 "InventoryDescription": "This is where you store your items and rewards for completing tasks and achievements on the server",

the other items probably just fell on the floor. did you look underfoot?