Yeah, that would be the fault of the "primary" switch. IDK if they tied it into the brake light switch in that generation of cruise control like they did on the later ones or if they used a discrete switch.
That reminds me.....
Sometimes my RABS would erroneously go off. But only when applying the brakes lightly on slight downhills. So I'd be like exiting a parking lot and "whoops, no rear brakes + mushy pedal". Was kind of comical and not very dangerous but it was also annoying so that module went in the trash.