Problems with 4G Huawei stick & RPi3 after upgrading to 13.0

Hi,

I have a remote system on RPi3 which has been running FreeBSD 12.x for 
about two years.
It has a Huawei 4G usb stick/dongle for internet connection:

Bus /dev/usb Device /dev/ugen1.6: ID 12d1:1f01 Huawei Technologies Co., 
Ltd. E353/E3131 (Mass storage mode)

Huawei stick requires usb_modeswitch to change it from mass storage mode 
to ethernet interface (it's seen
as ue1 after switch), so I have devd setup so that it performs this when 
stick is detected:

Bus /dev/usb Device /dev/ugen0.6: ID 12d1:14dc Huawei Technologies Co., 
Ltd. E3372 LTE/UMTS/GSM HiLink Modem/Networkcard

This all has been working very nicely, no problems at all.

Yesterday I upgraded the system to FreeBSD 13.0. To my great surprise, 
Huawei stick didn't work.
It is detected OK in mass storage mode, but usb_modeswitch fails with 
error -7 like this:

------
Look for default devices ...
  Found devices in default mode (1)
Access device 006 on bus 001
Get the current device configuration ...
Current configuration number is 1
Use interface number 0
  with class 8
Use endpoints 0x01 (out) and 0x81 (in)
Using standard Huawei switching message
Looking for active drivers ...
Set up interface 0
Use endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
  Sending the message returned error -7. Try to continue
Read the response to message 1 (CSW) ...
  Response reading failed (error -7)
  Device is gone, skip any further commands
----

I tried this maybe dozen times and usb_modeswitch succeeded once, without
any changes in anything, so it looks highly unreliable. No difference if 
I power off completely,
just reboot or reinsert the stick.

As this is at remote location, I couldn't leave it like this.
I inserted my backup SD card with FreeBSD 12.2  and everything works again.
The version of usb_modeswitch is the same (2.6.0).

What might be the problem here ?

     Ari S.