The customizable buttons on a MX3S mouse are working randomly, especially the scroll function between desktops is only working if Options+ is open and in the same screen, a multiple screen setup will not work and deactivate the scroll. Same goes for the other custom buttons which work randomly.

Long-time user of Options+ and MX products here, all permissions and background activity allowed, updated MacOS 15.4.1 system, and no changes to the setup whatsoever. The only change was this new Options+ update.