Ok so this happened only once for me, don’t think i’ve ever seen this on the forum (can be wrong tho :P).
Basically at one point my first troop stopped receiving and giving skull damage. Enemies were targeting my next (second, then third) troop with skulls, and when i matched skulls, damage was given by my second, then third troop. Enemy Gorgotha also targeted my second troop instead of my first with it’s spell.
Here’s the clip:
2:08 - Gorgotha attacks my 2nd troop
2:15 - Gorgotha’s spell gives damage to my 2nd troop
2:40 - i match skulls and my 2nd troop attacks
2:47 - again