I've had the same problem for a couple of days now on both my Rift and my Quest 2.
I've installed the Release Candidate version (15.8) of DeoVR on my Quest 2 and can confirm this fixes the problem.
To do this, do the following:
Op your Meta Hotizon Phone app
Select the headset
Open App Library
Select the app
Scroll down and unfold More Information
Click on Version number
Find Channel dropdown in top right corner
Select RC
Now go into your headset's app store, lookup DeoVR and update it.
I haven't found a way to update to RC version on the Rift.