No, but it sounds like you found the culprit-time to break out the soldering iron and reheat some joints. Or it could be the wires broke internally from flexing—either way this is about a 10 minute fix with a multimeter and a soldering iron.
Let's be honest, the flexible wiring design is cheap and works most of the time. Depending on how you built your bot may put more stress on the wires and solder joints at the HBP. Could there be a better solution? -of course, but it costs more money.
Understand that it is a great safety priniciple that if the thermistor is disconnected from the extruder controller by any fault in the wiring, the extruder controller reports 255C which is a very good thing as this would turn off the heater, not turn it on. If it was the other way around, the heater would be stuck on, until it burned out out caught fire (hopefully is can't get that hot due to thermal losses).
I have experienced this when I opened my bot adjust the stepper driver REF voltage and the cable slipped off the header pins on the extruder controller.
It all kinda falls back to trouble shooting 101.
Check wiring first
Check with a multimeter to see what's going on electrically
Either replace or repair the fault
