Returnal has been updated to version 3.03 today by Housemarque. You can get the complete patch notes for this update from here.
This patch has addressed a number of issues with the game ranging from the multiplayer expansion which was released as a free DLC as part of an update and multiple other fixes to the co-op mode. Take a look at what has been patched with the new update in the changelog below.
Returnal 3.03 Patch Notes
Bug fixes:
- Tower of Sisyphus: Added Audio Logs to new locations in the tower
- Tower of Sisyphus: Fixed a rare issue where Algos might refuse to die, or die too early in the tower
- Tower of Sisyphus: Increased leaderboard scrolling speed
- Co-Op: Fixed several issues where a client or host might encounter a black screen or hang when moving between biomes during co-op play
- Co-Op: Fixed multiple minor gameplay bugs
- Co-Op: Fixed two rare crashes in co-op mode