Ghost Troops are back?

Platform, device version and operating system:
iPad 6

What you were expecting to happen, and what actually happened:
Not sure if anyone else has seen this, but I’m getting a LOT of ghost troops, so I thought I’d mention it. By “ghost troops,” I mean troops that don’t disappear from the board when they die. The “end-of-turn” purge is working correctly, but it’s still pretty confusing.

Thing is, previously I only saw ghost troops very, very rarely. But over the past week I’ve seen them in every third or fourth battle on my iPad, mostly in Ranked PvP, but also in Delves and Pet Rescue. Not sure if it’s happening on PC as well, but I don’t think so.

How often does this happen? When did it begin happening?
Started about a week ago. Maybe a v4.5 thing. Might also be related to my using a Skull spam team for an extended period for the first time (including Wrath and Scylla).