[BUG] Error in loop Debug server

[FeromonDE]

Environment

• ShellyForHASS release with the issue: 0.2.2-b3
• Last working ShellyForHASS release (if known): 0.2.1
• Home Assistant Core release with the issue: 2021.3.0
• Operating environment (Home Assistant/Supervised/Docker/venv): Docker

Describe the bug

Аfter restarting the integration from integration UI, the log is filled with errors.

Steps to Reproduce

Restart the integration from integration UI. Check home-assistant.log

Expected behavior

Screenshots

Traceback/Error logs

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/pyShelly/loop.py", line 36, in _start_loop
    self.loop()
  File "/usr/local/lib/python3.8/site-packages/pyShelly/debug.py", line 89, in loop
    connection, client_address = self._socket.accept()
AttributeError: 'NoneType' object has no attribute 'accept'

Additional context

[scooper1]

this is quite nasty when it occurs - appears to eat memory leading to lockout of home assistant