can a winner lose ratings points?

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thephantom54321
Hello everyone, I just beat my friend in chess 960 and rather than go for the boring kill with the queen in two moves (maybe 3,i haven't checked yet) I took a knight and won in 4 moves. the result said "winner Thephantom54321 rating 1329 (-50)" I'm not sure what my rating was before but it think it was 1379 and my friend was definitely below me, he still is around 1179 I think. So what happened does anyone know? thank you Nigel
Martin_Stahl

If you are on the app, it is just a display bug. 

 

Your rating went up:

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