I guess the start positions of RA have a problem when too many players are missing on the field.
The enemy lost 1 Tomb Guardian, 1 Thro-Ra, 1 Blitz-Ra and a skeleton.
The enmey is playing defense. He still has 3 Tomb Guardian 1 Thro-Ra
Now the game tries to position them and changes the whole time without fixing one.
I uploaded a video of the problem on a website so it is better to see.