I haven't seen that. May just be a caching issue.
No flag anymore
Can't be cache: same issue on two different devices. Also, I'm using the iOS app on both. I asked because I'm one of those players. Strangely, I only miss my flag on live games, on 7 day games it shows normally.
A strange thing is, when I put the pointer on doncasmurro's name without clicking, it shows Andorra's flag.
Yes, I actually changed my nationality a few times before to troll people. And now my flag doesn't show every time I play.
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Why some players are now without flag?