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I tested it on track with version 8.0.2 for Android. There is a strange behavior of the time delta on the phone (live) when I use it in the car. It seems it fluctuates too much and the value is also around 0.2 - 0.3 s lower than the actual one in the exported video. Just look at the output of racechrono postprocessing on youtube vs what is displayed on the phone in this video to understand the problem.
Non sure it has already been fixed in the new release. Sorry in that case.
Similar issue seems to be present with the speed delta.
All the best
Great - thank you for taking care of it! I will test it again on 25h of August when I will be back driving on the Nordschleife.
All the best!