Describe the bug
Items, bosses, and categories in the GUI disappear entirely. Items don't match to their correct bosses. Dungeon bosses aren't in the correct dungeon.

To Reproduce
Open the AtlastLoot GUI.

Expected behavior
All bosses and their respective items are listen in the GUI.

Screenshots
https://imgur.com/a/YsmbwZp

Additional context
Video: https://youtu.be/IfnX_OeIWZE

Occurs with version v1.5.1-classic and v1.5.2-beta-classic.