I have this issue on a samsung tablet

Crom

I never had graphics issue until you released the latest chapter of quests. Already sent error report but it continues days later. Fyi

You can see in the image there is no text.

The one below the geah8cs themselves fail to display.

winterthur

Probably linked to the overheating issue. I have the same in the first picture. I've stopped playing already on the Samsung device. I am just doing daily login to collect rewards.

Maldroit2

Its not Samsung. Ive been having the first example happen in arenas occasionly since april or so.