The Public Test Channel (PTC) for Quest and Quest 2 v40 is starting to roll out today. Let's use this thread for collecting feedback on it. Share your impressions and let us know if you see any issues. Please make sure to also send in bug reports along with posting here if you notice anything wrong.
When sharing feedback, try to include as much detail as possible to help the team investigate.
After updated to V40 on my Quest 2, when I turn off the headset tracking setting. The 3DOF mode is completely unusable. (V39 and early are work fine)
This issue also posted in support section, and come with the video. For more detail, you can view it on here.