Hi,
I believe I had the same issue last night on my flight from SPJC to SEQM. I set my landing elevation to 7900ft. During approach and around the 1000 callout the diff press ECAS message appeared.
I had to do a go around due to bad weather. On my missed approach to holding my cabin pressure showed something around 14000 but the cabin temperature was normal at 23C and packs were green in ECS. I cycled the Pressure Cont button to man and back but it didnt seem to resolve the issue.
I decided to try a second landing attempt as my fuel was low. Unfortunately the AP jumped ahead of a few waypoints which seemed to be too close together and I missed my GS so I ran out of fuel on my third attempt ... 70 sim pax lives plus 1 crew were lost Pilot escaped unharmed 🪂