Flask 2.2 breaks Executor

[marban]

The recent Flask 2.2 release throws all kinds of context errors when submitting a job:

  File /site-packages/flask/ctx.py, line 256, in pop
    _cv_app.reset(self._cv_tokens.pop())
ValueError: <Token var=<ContextVar name='flask.app_ctx' at 0x7fb4152020b0> at 0x7fb4054b1f50> was created in a different Context