My Travelers Sack is stuck inside my backpack on tiles the is no longer visible..
So here's what happens..
When your extra slots are empty that you get from back pack or travelers sack but your other slots have items in them when you unequippe the pack or travelers sack it gets moved to the available slots currently provided by the equipped pack or sack but seeing as the extra slots are no longer visible you can not remove the sack from the inventory again casue yo cant click on it
This is not a problem with the back pack as its 4x4 slots so the left most 2 are still visible however the travelers sack can not be found again as its only 1x2.
Edit: aah Got moved here didn't search for backpack i searched traveler's sack.. Sorry and thanks for moving now i know how to get it back..
Forgot about the Shift+scroll trick with containers