This issue appears to be in the kernel driver itself. I guess it is some type of regression.
There was no difference using the mainline kernel or the default kernel inside another host with Alpine Linux distro (Linux alpine 5.10.16-0-lts #1-Alpine SMP Wed, 17 Feb 2021 08:17:06 UTC i586 Linux).
This issue appears to be in the kernel driver itself. I guess it is some type of regression.
There was no difference using the mainline kernel or the default kernel inside another host with Alpine Linux distro (Linux alpine 5.10.16-0-lts #1-Alpine SMP Wed, 17 Feb 2021 08:17:06 UTC i586 Linux).
The device still receives, but does not send.
Please report this bug upstream.