Reported by Lord Of Otakus#0001 on Discord:

[22:35] Lord Of Otakus: I'm not sure why, but when Questie is enabled, the Inactive section in the Reputation tab will always re-open after a UI reload (either by exiting the game or /reload.) When Questie is disabled, it will remain collapsed between reloads. I didn't see any setting in the Questie settings relating to reputations
[22:35] Lord Of Otakus: Not sure why Questie would affect the reputation tab either
[22:42] Lord Of Otakus: fixed it, its caused by ExpandFactionHeader(0) on line 13 of the QuestieReputation.lua module. Not sure if its essential, so i just commented it out

Duplicate of #3263