Reload lives!
No idea what did it, nor what caused it in the first place yet (and I don't have any more G-Wash to find out) but all I've done to it since the G-Wash was pat dry with a microfibre waffle weave towel, left it untouched over night and just flood rinsed it today and both Reload and BSD are now behaving normally (C2 and FK already were) so the test continues. I'll see what happens next time I wash the car with a different shampoo.
In the mean time, is it wrong that I want it to rain during the week so that I can get a HydrO2, WetCoat, Bathe+, BSD, Reload, C2v3 and FK2685 beading picture (or two)?