After multiple complaints from the community about the recently implemented communication ban, Valve decided to change the system slightly. All current bans are lifted.

As the new communication ban did not get approved by the community and many bugs - such as not being able to speak in lobbies when being banned - have been found, a new Dota 2 patch has just been released. It fixes the problems and allows banned players to use the chat wheel to still be able to communicate important information with the team. All current communication bans are lifted.

The patch also fixes a server stability issue and some other minor bugs.

- Chat wheel isn't prevented when communication banned.
- Fixed bug allowing more than the maximum reports/commends per week.
- Allow chat in private/tournament lobbies while communication banned.
- Players are now notified how much time is remaining on the communication ban.
- Fixed server stability issue that was resulting in a reduced number of servers and long wait times.
- Fixed issue where heroes were not displaying in the Loadout panel when using some items.
- Workshop panel updates the hero and item models on import.
- Fixed an issue where some courier effects were not being loaded and displayed.
- Fixed an issue where Lina's Fiery Soul skin was incorrect.

All current communication bans have been lifted as of this update.

Source: Dota 2 Dev Forums