Bubbers, you had not the same fault, as your airplane was completely in flight mode, while the jk5022 had only 2 (+2) system in the wrong configuration.
Out of this 4 systems, only 1 can be detected with normal pilot scan (RAT as it happened ). TOWS misfunctioning can only be detected if you do an unscheduled system check advancing the throttles. The others two systems (avionic cooling and ac x-tie) are backed up by others relays, and thus will be funcioning as normal
It's curios to see how an unessential (for safety) system like the avionic cooling has 1 or 2 backup relays, while the TOWS relies solely on 1 relay...
In your case you would have many and many systems misbehaving on ground, triggering something in your mind (as they have probably done)