I've got a toolbar button using "Go DRIVEBUTTONS=+xy,noletters,iconlettersoff" which is only supposed to show drives mapped to either X: or Y:, but whenever I plug my phone in, Opus generates a button for the phone's MTP connection. I'd rather it didn't show this, as the drive button is sitting next to a more general drive button which also shows the MTP drive.
I've tried adding the switch "-mtp" to the button, as shown in this old thread, but it doesn't make a difference (and isn't that just telling the button not to show drive letters M, T and P?).
I've also tested a few simpler versions: Go DRIVEBUTTONS (shows all drives, as expected, plus the MTP), Go DRIVEBUTTONS=mtp (shows only the MTP) and Go DRIVEBUTTONS=-mtp (seems functionally identical to Go DRIVEBUTTONS).
Am I missing something, or is this a bug?