Tetris Effect Connected has been updated to version 1.21 today by Enhance. You can find out the complete patch notes for this update from here.
According to the patch notes shared by Enhance, this update appears to fix issues with the multiplayer and resolves some other issues that have been reported by the players. You can get the details on this update below, or have a look at them on the Steam forums.
Tetris Effect Connected Update 1.21 Patch Notes
[ALL] Fixed an issue in MULTIPLAYER where the default camera position was more zoomed out when OPTIONS > GAMEPLAY > ADJUSTABLE CAMERA was OFF.
[ALL] Fixed an issue in CONNECTED / CONNECTED VS where the game could softlock when a player topped out and entered the ZONE at the same time.
[ALL] Fixed an issue in LOCAL MATCH where assigning an action to UP or DOWN on an analog stick in PLAYER OPTIONS > CUSTOMIZE CONTROLS still also would cause the camera to zoom in or out (along with the new action).
Other minor adjustments and bug fixes.
