We've seeing a lot of crashes and workflow instabilities from using Oculus Link + Quest with Unity recently (not sure if this is Unity specific though). This happens across multiple machines, so doesn't seem to be driver or device specific. We are using several Oculus Platform features (entitlement checks, P2P, Avatars) so some of it could be unmanaged code issues but not sure.
I'll try to describe the symptoms we're seeing here, because I don't know where they originate from.
Oculus app running, Link connected, Unity Editor running with VR scene → Oculus app crash
occasional (sometimes every 2min, sometimes every 30min) Oculus crash
sends "OVR.wantsShutdown" to Unity, stops VR from working
Oculus restarts automatically but Unity doesn't recover
ending play mode and starting play mode in Unity again does not resolve, needs resolution 
Oculus app running, Link not connected, trying to connect Link → black screen on Quest, no reaction anymore
after clicking "Oculus Link" in Quest, screen goes black. No reaction to any button presses. Need to unplug cable, then immediately back in Quest Home.
plugging cable back in asks for Link connection, but screen just goes black
Oculus does not crash, Link connected, but starting VR in Unity yields black screen, no head motion
disabling link > can't be enabled anymore
Oculus app running, Link connected, Unity running in VR → USB driver crash (?)
symptoms: several black flashes on screen, then a couple seconds (2-10s) where VR still works, then VR breaks, Oculus app restarts
sometimes resolution  helps, but mostly not
resolution  helps (PC restart, likely USB driver crash?)
Current Resolution strategies
Resolution : restarting applications
close any running app accessing Oculus
Resolution : rebooting Quest
Resolution : rebooting everything
All of the above happen across multiple machines, happen what seems like under random conditions, and sometimes every 5 minutes. Currently we're blocked from doing any kind of demos because this is happening so frequently (also on new machines) that we just can't demo without the risk of it crashing after 30s.
Really looking forward to some input here – is this known to Oculus? Are other people seeing similar instabilities? Where can we send a reproduction project to?