Would that problem be very similar to having a Transfer Pump Switch turned OFF?
Yep, pump eventually fails, and how it fails is anyone's guess, it could be complete, intermittent, or not being able to deliver the required flow rate.
Including Supply tanks showing permanent full and amber fuel caution not illuminating, first indication was reds.......
Would a permanent full indication be because the software logic in the display panel froze up or both supply tank sensors were giving a faulty reading?