Rocket League has been updated to version 2.13.0… here are the patch notes!
BUG FIXES
Fixed appearance of ‘Startrack’ Rocket Boost and Trail when previewing from a Blueprint
When backing out of a Playlist, fixed UI focus so you return to the previously selected Playlist card instead of defaulting to Casual
Fixed a UI error taking focus off of the Change Playlist/Training menu if selected by a player after a match
[Xbox] Improved boot times and general stability
Moved placement of Neo Tokyo (Comic) on the Arena list
KNOWN ISSUES
Before v2.13, in a small percentage of Casual matches, a spectator would sometimes join a team, creating uneven teams
We believe this issue may be unique to v2.12
If this bug persists, we have added additional error logging to the game client with this update so we can better identify and resolve the issue
You may have to check manually for updates for it to download.
[Source: Nintendo Everything]