A lot of tuning of controller logic for it to work well with other mods as well as to prevent some crashes and added checks and logging in case controller's internal state is incorrect so that it only logs in debug log suggesting which controller has issue and to break and replace if that message keeps appearing
Fixes issue where backpack open in offhand could be moved away from it causing loss/dupe bugs
Fixed a NPE that can for some unknown reason happens for element that doesn't happen despite it having a key in the maps keyset. This is likely caused by some mod interaction. Fixes one place where it happened but there can potentially be other stuff happening when players have this issue today.