Help on issues you run into with LapTimer; in case you have a question on how to use LapTimer, use the forum "Using LapTimer" instead
I never use the video preview and was not using it on this day. I really do not know what happened but I will try and repeat problem on a short trip around the neighborhood.
In case you didn't use Video Preview, the only other issue I can think of is some issue with database corruption. To check, please run Check Data from Administration ‣ Databases. In case inconsistencies are found, LapTimer may purge recording details for individual laps. The most frequent reason for inconsistencies are memory shortages, but there may be an number of other reasons things like this happen.