Missing big buildings ex. Concourse D is not showing just the gates but all other buildings are there.
But it's just ONE missing building ? And, it's always the same, or it's random ? I fairly sure you won't like the reply: if it's random, it means it doesn't depend on anything related to our software, which is running correctly according to your description.
The only possible explanation left (since you said it's not the Compatibility) for random disappearance of single buildings, and especially if they change when you select "Restart Couatl", it's that another add-on is stealing the Simconnect communication pipeline by sending so many commands in so short time, that our modules don't have the chance to talk with it.
Or, possibly, you are low on resources/memory, that the same happens. How's your frame rate, for example ? Are you able to check you free RAM while CYVR is running ?
About the "Compatibility" mode: even if you don't have FSX itself in Compatibility mode, it's possible that if you have another add-on launched together with it that IS running in Compatibility mode, it will make the whole sim session running in Compatibility mode anyway, which results in video drivers underperforming, and creating visual problems like disappearing buildings until you get very close.