The following patch notes were taken from an official Respawn Reddit post.
A Server Patch rolled out this afternoon and is currently live on all platforms! You don't need to download an update for this one.
Notes below from Respawn:
This afternoon we’ve pushed a server patch to all platforms to hotfix the following issues.
Fixed the bug that allowed players to melee during the pre-match flow.
Fixed bug where players could quit out of Ranked Matches before start and avoid abandon penalties and still get max RP.
Also want to call out some changes made to World’s Edge not specifically called out in the patch notes:
Adjusted loot distribution around the map.
Added more locations where Survey Beacons may spawn on World’s Edge matching the behavior of how they worked in Kings Canyon.
Lots, and lots of map-related bug fixes discovered and reported. Please continue to report map issues with screenshots and videos if you can. We’re watching!
You can follow bug tracking and updates on the Apex Tracker Trello Board.
Respawn has been combing through the Path 3.1 & Duos Event: Bug & Crash Megathread and working through issues. Run into a bug? Post it here so they can check it out!
Super Duper Late Edit
Super late edit: Just wanted to point out that a lot of people have been reporting that there a few new bugs introduced with the 3.1 patch. You can check the Dev Tracker (linked above), but the 3 big ones are:
There isn't a card for it at the moment, but there's been some videos of people instant reviving using a bug introduced with this server patch as well
Respawn is aware of these and doing their best to fix them as quick as possible.