Unable to collect dungeon reward + lost progress

Game glitched and froze on second boss of dungeon (Immol’thar). Finally got back in and restarted second boss fresh and won. Game wouldn’t let me collect the reward. Game timed out. Went back into dungeon and defeat of Immol’thar was lost.

Device type: Mobile
Phone: Samsung S20
System: Android
Warcraft version: latest (7.28.0)