reproducable crash with FW 9.11 destroyed fit file of the day

I have a reproducible error with FW 9.11: If recording and route guidance/follow a track are running at the same time and I press "End trip", the device crashes reproducibly and restarts as a result. If I end the route guidance beforehand, it does not crash.
During one crash, the fit file for the day was unfortunately damaged and not imported into my Connect account.

Are there any tools to view and repair .fit files?