no connection with usb wifi because of too long device name

I am using a laptop (Xiaomi Air 12, Intel) with debian buster (linux 4.19.0-6-amd64). I am using
nm (1.14.6-2+deb10u1) with the plasma-applet (4:5.14.5-1) and wpa_supplicant
(2:2.7+git20190128+0c1e29f-6+deb10u1). nm is working well with the
internal wlan (intel). However, using a ralink usb stick, it fails to connect

Jan 30 21:36:41 lina NetworkManager[663]: <info>  [1580416601.5122] device (wlx7cdd902eXXXX): supplicant interface state: ready -> authenticating
Jan 30 21:36:41 lina kernel: [ 1157.342652] wlx7cdd902eXXXX: authenticated
Jan 30 21:36:46 lina kernel: [ 1162.344096] wlx7cdd902eXXXX: aborting authentication with 98:9b:cb:12:XX:XX by local choice (Reason: 3=DEAUTH_LEAVING)
Jan 30 21:36:46 lina NetworkManager[663]: <info>  [1580416606.5911] device (wlx7cdd902eXXXX): supplicant interface state: authenticating -> disconnected
Jan 30 21:36:46 lina NetworkManager[663]: <info>  [1580416606.6926] device (wlx7cdd902eXXXX): supplicant interface state: disconnected -> scanning

A more detailed log can be found at https://pastebin.com/Pvdj29QA
Another log for a different time is at https://pastebin.com/ajxCZT8F

The problem seems to be connected to the long (predictable) device name (wich is
automatically created by the system). This has already been discussed here:

https://unix.stackexchange.com/questions/386925/aborting-authentication-by-local-choice-reason-3-deauth-leaving-when-trying

Therefore I used my own udev script to give a name to the device. Then,
connection can be established with an upto 14 character name (e.g. "ab345678901234") but not
with a 15 character name (e.g. "ab3456789012345"). Unfortunately, the predictable device
name generated by the system has exactly 15 chracters.

I then tested if disabling MAC Address Randomization (for scans) helps. I added

[device]
wifi.scan-rand-mac-address=no

to /etc/NetworkManager/NetworkManager.conf.

With this option, it worked even for 15 char names. But only if I dont define a "cloned MAC-
address" in the nm gui (plasma).

In the case that I used a short device name defined by my own udev script, it
worked with and without defining a "cloned MAC-address".

So it seems the problem arises if

- the device name is longer than 14 chars

AND

- MAC addess is cloned.

I also tried to start the connection via /etc/network/interfaces. This works
even for the 15 character device name. However, I was not able to start the
connection via e/n/i with a cloned MAC (didnt find a suitable syntax). Therefore
I could not check, if the problem is really connected to a cloned MAC.

Regards,

Juergen