async_has_matching_flow is more likely to be True than hass.is_stopping
This does not make much difference but it was adding noise to a profile
that I am digging into to look for another issue
The check for identical flows only worked after
the start event. We now check against pending
flows as well
If startup took a while we could end up
with quite the thundering herd
Erik Montnemery
J. Nick Koston
Paulus Schoutsen