Wildwood Rucksack not working properly

Apparently there's an issue with the rucksack slots that if you attempt to stash things or equip things directly from it, it just doesn't work or sometimes send/equip things from the main bag.

Way to reproduce is to have a few one slot items inside the rucksack and quickly attempt to stash them by pressing the square button (or equivalent on a non PlayStation controller), it will send another item to the stash (in my case my scrolls of wisdom).


Edit: I just realized this issue has been reported previously here.