I've been wondering the same. Apparently there aren't any? :/ I guess it's up to us to point out the bugs? Haha
Here's one bug that I'm sure everyone has found on v1.93: The AFK detection kicks out players that aren't AFK, but also players that are "inactive" because they're saving for a bomb. That has ruined some pretty close games. :(
Look at PATCH notes.. simply click on the game information button of the map, either while in lobby or while at arcade screen. Simply click on patch notes on the left after that... kind of duh :P all patch notes are there. Most games have patch notes listed there now instead of load screen.. Its fast and easily accessible.
As far as "AFK bug" it is not a bug at all, it is working as intended.
The game monitors supply levels. and if your supply level hasnt changed in 4-5 minutes, you get a warning to build or get kicked. Drop a marine or something if your saving for something.. that will avoid the kick.
This is to prevent LATE game AFK from ruining the game. Say your 15 minutes in and green your ally suddenly is afk... GG for you without afk detection kick.
Votekick simply didnt work because it was abused, afk detection by supply is an easy and effective sollution.
So in short: AFK kick is not a bug. Its game mechanics. Avoid it by building like the warning tells you....
And PATCH notes are located on game info screen, under the "Patch notes tab"......kind of self explanitory XD