It's a fact that bugs happen in games, which in multiplayer games can have pretty big consequences for players who want to enjoy their time online, and this has happened in Overwatch, as one thread has pointed out a pretty big issue that not only deducts skill points but also gives an instant full-season ban without prior offences.
The post emphasised that this was a bug, not just a usual ban, and game director Jeff Kaplan confirmed this by responding, saying:
"We recently identified a bug that, in extremely rare cases, can cause players to lose their skill rating progress and receive a seasonal ban from Competitive Play without any prior penalties for leaving early or being kicked for inactivity. This bug is a high priority for our team, and we're working on a fix to prevent further instances of it occurring as we speak."
"In the meantime, we'll be removing the seasonal ban for all players affected by this bug as well as restoring their skill rating. To date, this bug has impacted fewer than 200 accounts, but we'll continue to monitor for additional occurrences and provide assistance until we can implement a permanent fix. We don't have an ETA to share right now for when the fix will go live, but we'll update this thread as soon more information becomes available."
He also apologised for the inconvenience caused, but at least a quick fix was provided. Have you run into this bug?