Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, whilst doing deadmines i was unable to get out of combat. after completing the dungeon and leaving, i no longer had the combat icon on my portrait but i was unable to drink, change equipment or use flight paths.

The only way i have found to fix this is by using hearthstone, and the bug came back straight away again once i went in combat, so this isn't very convenient... is there any fix?