Itās a mistake in the manual ā R will delete a cue when youāre on one, or save a new cue position when youāre not.
I had all kinds of trouble with my W/ this evening ā mostly the weird glitchy noise thing, but also crashing (with all lights off) after attempting to switch tapes, and failing to record. In the process I learned the hard lesson about Teletype scenes not saving through a power cycle ā fortunately the hard part was already in a scene Iād saved.
I perservered and got it going, but it was frustrating enough that Iām hesitant to use it too much until thereās a bug fix available.