I have read that multiple people have this issue.
And the problems starts when both homey and the app want to connect through the same wifi network to the neato.
Is there a reason you still need the app once the neato is connected to homey?
Does the connection work if you disable wifi on your phone for a while? If you don’t need the app any longer perhaps remove it and just do everything through homey.
I am still considering buying one as well and still have a few days.