If you see a match without the timer, it is most likely due to a synchronization glitch with the game servers. You should immediately force close and restart the game (after that match completes) before starting another BG match, because the odds are much higher that you'll crash out of a match and lose due to that sync error getting worse and then disconnecting you from the battleground servers, whereupon the game client will continue to run for a while then abruptly terminate your game session. Which of course will cause you to lose that match on time.
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Restart the game to fix it