That's not something I have seen reported before, so hopefully, it was just an anomaly!
If it does happen again, could I kindly ask you to generate a Support Package within the Fly the Line app (instructions here) and then create a ticket with Just Flight Support via the following link with that attached: https://www.justflight.com/support
Our support team will then be able to pass the logs onto the development team for further investigation.
Mark - Just Flight