Hi Maria, thanks for the response. We do not use a multi-network (only a multi-site.) The plugin has been installed for 2 or more years but only started doing this about 1 year ago.
This issue occurs because you did not set any targeting conditions for the popup, so it uses the default which is to load everywhere.
We have targeting set for most of our popups (set to a show on specific pages) so that the popups only are on the pages that we need them on. This works ok until all of our settings are randomly reset and then all of our targets are deleted.
I will contact support to create a ticket.