I have two machines (a Studio and a MacBook Pro) and I use Universal Control to share a mouse between them. It's far from perfect, but it works.
When I upgraded the second machine to 15.1 yesterday (29/10/2024), Universal Control between the machines became completely unusuable (connection drops up within a second or so of occurring).
Has anyone else experienced this?
I did reach out to Apple Support. I got Apple but not Support.