Player inventory with correct scrollbar:

Player inventory scrollbar missing if item with a large inventory is opened:

Player inventory when a small inventory item is opened works correctly:

Ignore the text mess in the console, i have opened an old save and mods got crazy, this problem is not tied to any specific mods.
Steps to reproduce:
1. Have player inventory increased so it needs a scrollbar.
2. Have a chest with invetory increased so it needs a scrollbar.
3. Open that chest.
What happens: Only the chest scrollbar is displayed.
What should happen: There should be two scrollbars, one for the left side with a player inventory, and one for the right sice with the chest inventory.