My F56 has a 1700km on the clock and gave two error msgs last week.
1. Limit function failure
2. Something regarding an engine failure (will get the exact words later)
Took it to my local dealer, they did diagnostics which indicated nothing wrong, but advised that I book it in next week for a full check.
Sorry to hear that - if you have an opportunity to take photographs or a quick video - do so - it gives you proof of evidence that something is wrong - it might sound daft but if other things were to go wrong at least you'd have your back up - coming from someone who had a very bad experience not so long ago...