After installing the Insync package from the AUR on Manjaro, running Gnome using Wayland, the main program window has no client side decorations, and there is no status icon in the top bar. Some actions then become cumbersome, such as moving or resizing the window; closing the program can only be done via killing the process on system monitor; checking the sync status requires opening the window.
As extra info, my second laptop with an older installation of the exact same OS version, but running Gnome under X11 instead of Wayland, shows no problem.