While Dota 2 is one of the most popular PC games right now it also a candidate for the "buggiest" PC game right now as well with over 1000 known bugs still unfixed by the developers.
As of the time of writing there are more than 1000 known Dota 2 bugs that are not fixed yet according to the Dota 2 dev forums.
While Dota 2 is being updated regularly it seems that a lot of bugs keep popping out and some are even game breaking.
Here are some bugs in recent Dota 2 history that was abused by players worldwide, some bugs shown have been fixed while some aren't.
And here is one major bug that will see players get punished by game for no reason at all. By finishing a match, the game will put you in low priority for no reason.
One user in the Dota 2 Dev forums posted:
"For certain players, after a ranked match pressing the disconnect button on the scoreboard will not actually send them back to the main interface and leave them with the 'reconnect' and 'leave game' options, as if the game was still ongoing and the player had disconnected. Pressing 'reconnect' accomplishes nothing as the game is over, 'leave game' is the only other option. However, for some reason, pressing 'leave game' will count the game as an abandon for the player and the consequences result in loss of MMR and low-priority."