Multiple copies of a creature make it impossible to activate abilities on mobile
On mobile, multiple copies of the same creature overlap too closely, making it impossible to activate an ability of creatures further down the stack. Specifically prevalent with Regenerate. Adding regenerate to a creature doesn’t reclassify the creature, and leaves it in the same stack of creatures, making it impossible to activate the regenerate ability of the other creatures in the stack, which ends up causing unnecessary creatures from being destroyed, which causes a negative gameplay experience due to the poorly programmed mobile UI.
(The second copy of the Kin-Tree Warden died in combat when it would not have if I had been able to activate the regenerate ability)