Just one thought (I’m running a very similar setup and just did a complete re-install according to my step-by-step): Perform the same on a test installation and see if this works, to check whether it‘s maybe a hardware problem?
Alternatively, before 3.4 was out, I faced the problem of the stick not coming online, which I solved like this. Though, to be fair, that was a solution for a stick tja got online once but not after a reboot.