Pack: AoF4 1.0
Mod: 2.2.1

Steps to reproduce.
Craft a Dank 1. (ID #)
Put a stack of cobble in Dank 1.
Upgrade Dank 1 to Dank 2 in crafting grid.
Switch Dank 2 to bag mode and open (ID now ID #+1)
Dank 2 no longer contains items.
Verified for Dank 1,2,3,4