Local Deployment for SureFlap / SurePetCare Connect using only local MQTT Broker

I know SurePet changes have killed off this project and this is a bit off topic but hoping people that have played with it previously might be able to help.

Do the Surepet products maintain their own local time?

Our catflap is really weird, if we give it a fresh cycle of batteries and a cat uses it the event is near instant in the timeline and all good but as time goes on it starts falling behind, and so a cat can go through the flap, the timeline will update near instantly but the time associated is in the past. (so timed access has now become useless)

Surepet just keep giving me the usual script responses of try this, try that as there’s a delay to the server. Clearly not when the timeline is updating near instantly!

Despite me pointing this out to them multiple times and the fact we have no other issues with their feeder products, I’m at the point of giving up with support.

I think it’s a case of buying a new flap (is several years old) but first want to check my theory that its down to the flaps own local time falling behind.