Duels bug?

full image - Repost: Duels bug? (from Reddit.com, Duels bug?)

I just played a duels game and it was down to a 1v1 and suddenly my buttons stopped working..? Not sure if it’s some sort of hack or bug but it won’t let me look at the replay either. Anyone know what this is? My main brawler is 1400 trophy btw

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