Thankfully it was only Quick Play, but it did end up costing us the match. I was sad lol.
Sorry… I can’t help but feel bad. I’ve had a lot of my games ruined because of glitches but mostly small, funny ones that I don’t mind.
It wasn’t too upsetting or anything really. Just a little annoying to know that I lost because of something out of my control and even the enemy team’s control. Oh well, it’s just a game.
There was a bug that got removed, Mercy could fly to allies after a short period they get behind a wall.
Another words you knew you would die when that happens, bcs Mercy rejects to fly to the ally and well you know…
The patch that brought us Moira also made my game force close with gfx card error if death spectate included her anywhere on screen.
I tried every. Single. Driver version AMD has ever released for my card. Same issue persisted.
Official support was imho rude to me at the time (granted I was very frustrated and not exactly being the easiest customer to work with either) and said it was a power supply problem. . . But I run with a 1600W single rail closely monitored PSU on an apc powercleaner. . . My power could be out for an hour and a half and the game wouldn’t crash… Unless there was a Moira on screen after I died and before I spawned.
In my various hunt to track down the issue, I was at least able to assist a number of other players in the tech help threads with similar, but not exactly the same, issues.
What I was facing was somehow mysteriously fixed a couple of OW patches later.
Still no clue what the specific issue was, or what blizz did to introduce/resolve the error, even went and rechecked every setting, driver, etc to try and “break it again.” to no avail. 
So sorry, sounds like it sucks. I actually bought the game when Moira first game out.
When I couldn’t see my character, teammates or enemies. All that was their was a glowing blue sphere for teammates and a red one for enemies.
This is the worst glitch (for Blizzard) because it caused servers to melt but it’s also the best because it was SUPER fun.
I miss the infinite bot glitch.
if you think that’s the worst then you don’t know the half of it.
How about the invincible teleporter?
Or Brigitte Dive Edition
Remember when Watchpoint Gibralter had no floor? You just died, infinitely
Had something similar when everyone had the enemy outline so I didn’t know who to heal.
Had a game where I tried to use Mei’s ult and the robot fell through the floor. I’ve also seen the payload destroy the robot as well.
I’ve seen roadhogs hook bounce off of things like junkrat traps and torb turrets before finally landing on the intended target.
Hmm I wondering exactly what happened…
I had the Dva eject bug but when I respawned I just kept falling. So I just kept dying over and over
Oh sorry, it seems like her eject has had a lot of bugs from most of these thread comments.
Those, just like all invincible turret bugs, requires often a specific situation to trigger the glitch. And while the conditions could happen in a few matches, it was not common.
Self destructing ultimate affected everyone, all the time, at no fault of their own. That’s why I consider it a worse bug.
Using piledriver and getting stuck in corners or weird geometry of the map. Dorado where the hoverbike is was a big spot.
Having all abilities phasing through targets as Doomfist.
Ashe’s primary fire not registering, even on stationary targets.
Sigma’s left hand would be twisted which could only be fixed by switching then switching back. Still in the game btw
Hook phasing through walls or around corners.
Orisa’s drum falling through the map, destroying itself.
Junkrat being stuck in place after using riptire unable to move. Got kicked for being afk.
Getting stuck in the roof as Reaper with no way out.
Having the Heavy in retribution fall off the map and we couldn’t progress because no enemies spawned and the next area was locked.
There’s a Doomfist glitch that has you Slam infinitely in the same spot, only being able to turn in place, but holding the Slam animation. It’s happened several times on several maps, seems to happen most when you accidentally get between two pieces of environment and the game registers and the desired location to be between those and insists on putting you there, even if you can’t get there physically.
This happened on Ilios Well when I got booped into a corner while doing Slam and the enemy didn’t notice me there for like 5 minutes fighting my team. A Roadhog turned around and yanked me into McCree and I died shortly after. Fun times.
This was way, way back, but my teleporter built without a portal and then destroyed itself after a few seconds. This is ultimate teleporter, btw.
I was crying 
A big that happened to me a fairly long time ago a bit before D.Va got her missiles added.
I tried to launch my D.Va Bomb into the enemy team but my Mech dropped like a stone even though I still had roughly 50-75% booster duration left. Instead of the Mech I (Baby D.Va) got thrown into the enemy team. Luckily the enemy was just as confused as me and I managed to run away towards my Rein.