• Craft to Exile Version 2.14.1c (but this has occurred since 2.14.0)
• World Type multiplayer/dissonance
• RAM Allocation 8GB

Icons from the main part of my inventory remain on screen after I close my inventory

To Reproduce:
Either open and close inventory or open inventory after opening backpack which is in my backpack armour slot. Icons remain on screen at least 50% of the time. I have to re-open and close my inventory to make them go away.

screenshot

it's not a bug it's part of the mod inventory hud+, you can configure it in the game