Is this evidence of cheating/tampering? Has anyone else experienced this?

This was going to be my first MUT H2H playoff win. My opponent’s team was incredibly stacked (too bad I can only upload one video, but I pretty much closed out the game in my previous play), and I was very excited about this win. I had absolutely no connection issues at all during the game. My internet is fast with low latency. My opponent paused the game, and I was disconnected from the EA servers. This has happened before, and I suspect tampering, but this was just too blatant. They are losing with a team they likely spent hundreds on in a playoff game.

Have you experienced this before? And what have you done about it? I don't think I can be convinced that this was a coincidence.