Comment 68 for bug 1838133

Correction to my prior post: 20.04 live CD has the same issue. Wireless works for a little while, allowing to see and connect to networks, but stops working shortly thereafter.

Further, just trying the 20.04 live CD appears to mess the wireless card when returning to 19.10 (which is installed on a proper drive in my laptop). Needed to reinstall the kernel (same version: 5.3.0-51-generic) in 19.10 to get it working again. I have no idea what this means.