I was in a battle using my Edmontoguana versus a Full HP Diorajasaur.
I managed to use Stunning Rampage against it and got stunned.
The point is the rival let the clock reach 0. When I used superiority strike on next turn Diorajasaur used counter attack.
How is that possible? If next turn is blocked rival cannot use either counter attack nor any attack.
This has just happened twice in the last week. And don’t know if rival was really AFK or exploiting this bug.
I will try to reproduce it in friendly battles to record it.