I bought 2 new Hopper devices and wanted to install mesh, I usually prefer to use developer version, so I installed version 4.0 alpha 11 on both devices.
However, no matter what I did, I couldn't install wireless mesh on 2 devices, when I connected wired, it connected without any problems, but when I disconnected and positioned the cable, it did not establish a mesh connection at all, when I pulled both devices back to the stable version 3.9.4 then they connected, so aplha 11 also connected with mesh. I wanted to let you know as I think there is a related connection issue.