I know I've seen this before, but just had an FSK 2.4 SM do this to me - real bugger too because it was the last in my truck while I was out doing a site test.
Any ideas what caused it or how to fix it? I think I was in the process of changing color codes when it happened. It's just my truck test unit running 11.2 firmware. Going to 13.1.3 didn't fix, nor did going back to 10.5. Put in a real default plug and reset to defaults too. -Steve D