He only spent a few turns on the field, so I have no idea if the effect was still there even though the graphic was not shown, so it may or may not be purely visual. Confirmed in chat that my opponent was not seeing it either.
Oh I just wanted to report that and found this here with the search function ;).
Addition: It only seems to be a visiual problem (I tried it in a test game )
Looks like your connection to Focus Home Interactive - Official Forums was lost, please wait while we try to reconnect.