This has happened to me twice today. I was playing a match, 1-v-1, different opponents each event of the bug. The first time i got no pictures, but the second time I took a screenshot after the fact; exactly, at the beginning of my next turn.

At some point, I played "Expel the Interlopers" (you can see it on my graveyard). My opponent had five creatures at the time (first match) and four creatures (second match). During the first match, I had one creature on my side. When I played the card, only one creature seemed to be destroyed and removed from the field (the creatures you can see on the screenshot were left there). However, they could not be used at all during the rest of the match, as if they had been removed. Only the cards were still on the field and (as far as I know) could not be interacted with: the first time, I thought I had screwed up choosing the number with "Expel the Interlopers", so I tried to exile another creature and my card was not playable.

Anyway, effect-wise the card worked alright, but most of the cards on the field were not removed from there in the interface. Which was confusing and a bit annoying to watch, for the field kept adjusting itself to fit new cards as they were played.