Problem with repeating quests after dungeon exit

[55ninja55 0]

I am experiencing a fairly old bug, but nowhere can I find information on how to fix it.

 

The problem is with resetting some quests after completing the dungeons. When the player finishes several quests on the server and sometimes enters and exits the dungeon, random completed quests restart (and player can do them again). The problem is completely random and I can't figure out the cause.

 

I am asking for help and will be grateful if somebody share solution.

[55ninja55 0]

bump

[55ninja55 0]

Can someone help me with this issue? This case is very critical for our team project :/