Hi,
without an example I can only give you a general answer. Yes. this is unfortunately a sim “feature” where we can´t do anything. This exists since day one and we have reported this to ASOBO/MS.
You see this “warning” in the release notes also, or you can look on the topic from February this year:
Again, this has normally nothing todo with the mixed stock data or our unique data. This is the in-game flight management.
But to be 100% sure, possible you can give us an example, that we can try to find out if this is really the same issue or any other one.
Thank you very much,
Richard