Getting team messages either really late or... from another player's game?

Was playing a round when I noticed some (very angry) messages being written. I got defensive because I thought they were flaming me (the messages were about a support hero on the team and I was secondary support).

I had to have a good look because the messages were being received from a player who was NOT in the present match.

Screenshot is available on imgur; just attach /a/QLLjaaD after ‘.com’

If you look at the screenshot, I’m the Mercy saying thanks to our Zenyatta. We were attacking on Eichenwalde - that was the PRESENT game. But below that, you can see the angry messages almost like they’re being sent in real-time? And those players were not in the present game.

I had to ask my friend to look at my photo because I was extremely confused as to where the message from coming from. He said; “they were players from our previous game (on Illios), but those are messages I haven’t seen, they didn’t say that when we were on the map”.

So it’s either the message getting received very late or… comm leak? I don’t know what kind of bug this even is…