Rfxcomm broken after upgrade of core to latest version

I am getting the error logs:

2021-08-11 16:22:29 ERROR (Thread-4) [root] Uncaught thread exception

Traceback (most recent call last):

File “/usr/local/lib/python3.9/threading.py”, line 973, in _bootstrap_inner

self.run()

File “/usr/local/lib/python3.9/threading.py”, line 910, in run

self._target(*self._args, **self._kwargs)

File “/usr/local/lib/python3.9/site-packages/RFXtrx/init.py”, line 876, in _connect

self.transport.reset()

File “/usr/local/lib/python3.9/site-packages/RFXtrx/init.py”, line 723, in reset

self.send(b’\x0D\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00’)

File “/usr/local/lib/python3.9/site-packages/RFXtrx/init.py”, line 719, in send

self.serial.write(pkt)

AttributeError: ‘NoneType’ object has no attribute ‘write’

2021-08-11 16:22:31 WARNING (MainThread) [homeassistant.setup] Setup of input_number is taking over 10 seconds.

2021-08-11 16:22:31 WARNING (MainThread) [homeassistant.setup] Setup of input_text is taking over 10 seconds.

2021-08-11 16:22:31 WARNING (MainThread) [homeassistant.setup] Setup of counter is taking over 10 seconds.

2021-08-11 16:22:59 ERROR (MainThread) [homeassistant.components.rfxtrx] Connection timeout: failed to receive response from RFXtrx device

2021-08-11 16:23:03 WARNING (MainThread) [zeroconf] Error with socket 22 ((‘fe80::6af5:14a4:914a:4fea’, 5353, 0, 2))): [Errno 101] Network unreachable

Traceback (most recent call last):

File “/usr/local/lib/python3.9/asyncio/selector_events.py”, line 1056, in sendto

self._sock.sendto(data, addr)

OSError: [Errno 101] Network unreachable

This was working fine in my antique april version. I am running HA under docker, and I am passing in the appropriate port ( --network=host
–device /dev/ttyUSB-ZStick5
–device /dev/ttyUSB-RFX433XL
)

What am I missing?

Seems if I change the integration (delete, re-add, pick a new serial device) to use /dev/ttyUSB1 then it works … for some reason /dev/tty-RFX433XL no longer works, although the Pi lists it as a valid (alias, I guess) device.

Arrgh.