##### Start Minepacks version info #####
Minepacks: 2.4.3-Release
Server: git-Paper-101 (MC: 1.18.1)
Java: 17.0.1
#####  End Minepacks version info  #####

### Details
**Description**  
When the backpack item is held and opened while looking at a nearby block (the item gets placed) while in the offhand, after closing the backpack inventory it disappears and so does the item. 
To get the item back one needs to use the hotkey to get it out of the offhand and it appears again.

**Steps to reproduce**  
look at nearby block
place the backpack item to open it
close backpack
item gone

**Expected behavior**  
backpack item returns to offhand just like when doing the same with hotbar

**Other information** (e.g. detailed explanation, related issues, suggestions how to fix, links for us to have context, screenshots, etc.)
The following is a short video showing what happens (yes the first few seconds are black, no i don't know why).