A new minor update has been brought about which fixes bugs for Symmetra and Ana in competitive play. These bugs were pretty game changing as they had the potential to alter the result of the match.
The changelog :
- Mouse 4 no longer controls backwards menu navigation, preventing conflicts with other functions that might be bound to that button
- Fixed a bug preventing audio from mixing correctly on the main menu screen
- Fixed a bug that sometimes allowed Symmetra to place Teleporters and Shield Generators inside her team’s spawn room in a competitive match
- Fixed a bug that allowed Sombra to permanently hack a health pack
Source : BattleNet