I haven’t experienced this - or maybe the training data for aviation is limited. But ask a an llm for aircraft performance / flight planning data and it’s scary how bad the advice /feed back is.
(And even for things that were in the training data you don't have any guaranty they will be reproduced correctly, there is just some chance something meaningful comes out, or it doesn't, it's random.)
The whole idea to use a next token predictor as "answer machine" is completely flawed. This can't work like advertised, and that's by construction.