I noticed that when Natalya burns an enemy, there is often no icon on it, but the effect is applied at the end of the turn.
Hmm, this is similar to what we had for defense down for Sun Shangxiang, but for burn damage.
But that issue is fixed, so it must be some other issue.
@Petri can Staff look at this ?
@SirSin if you have more details (maybe a screenshoot) about which heroes did you used and what heroes were there in the opponent team, than I think that would be helpful for Staff.