I believe this patch needs to be included:
https://git.deluge-torrent.org/deluge/commit/?h=develop&id=351664ec071daa04161577c6a1c949ed0f2c3206

without this I get tons of spam logging

Unhandled error in Deferred:

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/deluge/common.py", line 1344, in run_profiled
    return func(*args)
  File "/usr/lib/python3.8/site-packages/deluge/core/daemon_entry.py", line 137, in run_daemon
    log.info('Exiting...')
  File "/usr/lib64/python3.8/site-packages/twisted/internet/defer.py", line 1613, in unwindGenerator
    return _cancellableInlineCallbacks(gen)
  File "/usr/lib64/python3.8/site-packages/twisted/internet/defer.py", line 1529, in _cancellableInlineCallbacks
    _inlineCallbacks(None, g, status)
--- <exception caught here> ---
  File "/usr/lib64/python3.8/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
  File "/usr/lib/python3.8/site-packages/deluge/log.py", line 69, in info
    yield LoggingLoggerClass.info(self, msg, *args, **kwargs)
  File "/usr/lib64/python3.8/logging/__init__.py", line 1434, in info
    self._log(INFO, msg, args, **kwargs)
  File "/usr/lib64/python3.8/logging/__init__.py", line 1565, in _log
    fn, lno, func, sinfo = self.findCaller(stack_info, stacklevel)
builtins.TypeError: findCaller() takes from 1 to 2 positional arguments but 3 were given

Temporarily disabling observer LegacyLogObserverWrapper(<bound method TwistedLoggingObserver.emit of <deluge.log.TwistedLoggingObserver object at 0x7f9aea2c23a0>>) due to exception: [Failure instance: Traceback: <class 'TypeError'>: findCaller() takes from 1 to 2 positional arguments but 3 were given
/usr/lib64/python3.8/site-packages/twisted/internet/defer.py:962:__del__
/usr/lib64/python3.8/site-packages/twisted/logger/_logger.py:190:failure
/usr/lib64/python3.8/site-packages/twisted/logger/_logger.py:144:emit
--- <exception caught here> ---
/usr/lib64/python3.8/site-packages/twisted/logger/_observer.py:131:__call__
/usr/lib64/python3.8/site-packages/twisted/logger/_legacy.py:93:__call__
/usr/lib/python3.8/site-packages/deluge/log.py:204:emit
/usr/lib64/python3.8/logging/__init__.py:1481:critical
/usr/lib64/python3.8/logging/__init__.py:1565:_log
]
Traceback (most recent call last):
  File "/usr/lib64/python3.8/site-packages/twisted/internet/defer.py", line 962, in __del__
    log.failure(format,
  File "/usr/lib64/python3.8/site-packages/twisted/logger/_logger.py", line 190, in failure
    self.emit(level, format, log_failure=failure, **kwargs)
  File "/usr/lib64/python3.8/site-packages/twisted/logger/_logger.py", line 144, in emit
    self.observer(event)
--- <exception caught here> ---
  File "/usr/lib64/python3.8/site-packages/twisted/logger/_observer.py", line 131, in __call__
    observer(event)
  File "/usr/lib64/python3.8/site-packages/twisted/logger/_legacy.py", line 93, in __call__
    self.legacyObserver(event)
  File "/usr/lib/python3.8/site-packages/deluge/log.py", line 204, in emit
    getattr(LoggingLoggerClass, event_dict['log_level'].name)(
  File "/usr/lib64/python3.8/logging/__init__.py", line 1481, in critical
    self._log(CRITICAL, msg, args, **kwargs)
  File "/usr/lib64/python3.8/logging/__init__.py", line 1565, in _log
    fn, lno, func, sinfo = self.findCaller(stack_info, stacklevel)
builtins.TypeError: findCaller() takes from 1 to 2 positional arguments but 3 were given