Status: after the purge of all things hyper-v and even related software my Ubuntu 22.04 VM was more stable.
It is, however still freezing, albeit it with less frequency. As stated earlier, my Windows VM on the same machine has no issues.
Also, by way of reminder, this device is always on. Therefore the issue is not a function of sleep or power savings.
Bottom line: there is no fix or workaround. The best you can do is to remove hyper-v completely and grin and bear your way through the occasional virtual processor lock ups.
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FYI: guest update means updating the guest OS running on your VM.
