Dungeon fight rewarding not correctly

Platform, device and operation system
Android, 10, Samsung Galaxy M20
What were you expecting to happen, and what actually happened
I am level 50(85) and finished every skirmish and dungeon before Update to 0.38
For every dungeon fight at high difficulty ( e.g. XIII) I only get Gold, Experience points and a iron chest. And no marks at all!!! Iron or Gold chest is highest. And chest content is low level.
Same happens when looting, also up to difficulty X.
It does not happen in case of event dungeons.

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How often does this happen? When did it begin happening?
Since new update 0.38.
Is this a once-off issue or has it been a consistent issue? Does it only happen in specific circumstances?
I tried different dungeons at different difficulty (about VII and higher) and some also several times.
Steps to make it happen again
Please detail the steps taken to trigger this bug. The more detailed the breakdown, the easier it is for us to test in-house.