Updated to the newest SteamVR beta https://steamcommunity.com/games/250820/announcements/detail/3038136886322358281 and now vrcompositor stops rendering altogether.
Video, it happens at 0:51: https://youtu.be/oQyWnGKRP_g
Side notes:
The beginning works much better than in my first video because I upgraded from RX 480 to Vega 64.
On the Vega 64 I still noticed the same bad async reprojection effects later on in Senza Peso.
I also updated llvm&mesa since my last try, so I can't say for sure that the freeze is SteamVR beta's fault.
Somewhat good news: With async reprojection disabled, Senza Peso runs much better now, example:

Sound crackling is almost completely gone too.
With async reprojection enabled I can't really test because it still freezes after a short while, and I also see #166 now.
With some luck it will work better already with async reprojection, once it's fixed.
I think this should be fixed with the 1.7.2, but can you confirm. I want to track down any remaining perf issues with async.
These specific issues are so old, I am sure they are irrelevant now.
Nothing extracted yet.
Using RX 480 with latest mesa git: sysinfo.txt
This affects some games. One of them is Senza Peso. Here's a video: https://www.youtube.com/watch?v=fV6IuRvNrPk
If you watch the frame time graph, you'll see the issues. There's this stair effect where some bad effects accumulate and then some massive CPU usage happens.
Using enableLinuxVulkanAsync" : false, makes the frame timings a lot better though there are still issues sometimes like this:
