Zoom reporting - participant count

Hi there, we noticed in our monthly Zoom reporting that it has started included Zoom calls with only 1 participant.

We've reached out to some of our users and have found majority are user errors where they've joined the call, no one else shows up and they forget to disconnect.

We can't think of any other instance where a call with only one participant would be considered a meeting that went ahead.  We are considering excluding these calls from our tally of monthly completed calls. 

Has anyone else encountered this or have any background info on why these have started to be included in the reports? 

Thanks!