Hey,
this happened to me few months ago but i still remember what happened
.
To be clear: me and my team were capping the first point in Hanamura but suddenly the match ended giving no extra time as usual with us all still on it:thinking:…
Being a blatant bug i managed to record it:
Hope this is gonna be useful for you 
P.s i know that shooting at a bubbled Zarya is illegal, have mercy of me 
Hmm, I haven’t seen that one before. It looks like a very rare timing issue. It looks like you capped it the moment time hit zero(maybe a frame or line before) and at that moment it checked if you were on point, but since you capped it and it hadn’t awarded time yet it made you lose.
Also, shooting Zarya bubbles isn’t bad if the enemy Zarya is overextended and everyone shoots her(if you think Zarya can die then shoot through the barrier). Defense matrixing her at that time was the thing I saw that looked like a misplay.
As I remember overtime bar should appear if enemy team was on the point in ~3 sec before end, so they were and in this case it should appear. Hope explanation is clear.