Unless I've missed something then the rear wiper doesn't have a setting for constant operation. Given the aerodynamics of the car then the rear end certainly collects cr4p at fast rate in wet conditions. Others cars I've driven with a rear wash/wipe have had both intemrittent and constant settins for the wiper, I'm at a loss to understand the FL2 doesn't have it, because IMHO it certainly needs it - if you want a view behind that is !!!

I'm afraid you didn't miss anything.
It would have been nice, certainly in heavy rain. I already thought I had forgotten to enable the rear wiper when driving through heavy rain and looking in the inner rearview mirror. Then it suddenly did his thing.