umqtt subscribe to topic with 23 bytes fails

Hi,
I can't subscribe to topic longer than 122 bytes. Publishing works fine!
I kindly ask you to verify and hopefully fix it
Thanks a lot
Danny

OK - working:

#122 bytes
mqtt.subscribe(b"/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/2") 

but one more character:

#123 bytes
mqtt.subscribe(b"/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/23") 

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "test.py", line 169, in <module>
  File "umqtt_simple.py", line 154, in subscribe
  File "umqtt_simple.py", line 173, in wait_msg
OSError: -1

this might be related to #163 which also deals with 127 bytes

it might be related to https://github.com/micropython/micropython-lib/blob/f20d89c6aad9443a696561ca2a01f7ef0c8fb302/umqtt.simple/umqtt/simple.py#L148 as this is hitting the 128...

Start by reading umqtt_simple.py around subscribe at line 154 and wait_msg at line 173, then compare the referenced umqtt.simple implementation near line 148. Reproduce the boundary with the supplied 122-byte and 123-byte topics and trace the resulting OSError. Done means subscription succeeds at the reported boundary and the behavior is covered by a regression check.