Guild Buff permissions automatically changing

[Laraki]

Bug name

Guild Buff permissions automatically change. At random times, with the guild leader having made no changes to permissions, i sometimes login and find I am unable to use the guild buff, I have to pm the guild leader and the guild leader then has to go into the menu and resave buff authority for the different ranks, I am then able to buff.

Time of occurrence

Happened twice over the past two weeks from end of january / start of february 2019

Description

-Guild leader sets permissions to allow a rank to use guild buff
- that rank can use the guild buff for a time
- at some point the permission system resets itself
- the rank can no longer use guild buff
- leader must go into menu and reset permission

Reproduction Steps (Optional)

- Unsure

Note: Feel free to add screenshots / videos in the description or reproduction steps part.