Problems with Simulator

I develop with VS Code and the Monkey C Extension.

For weeks the simulator worked flawlessly when playing a fit file for activity testing for Edge devices.

Since yesterday there are some problems:
-during activity Start and Stop works, but not Pause/Resume: info.timerstate does not deliver 2 (only 0, 1 and 3).
-info.elapsedDistance delivers no value  
-info.averageSpeed delivers no value  
-info.totalAscend delivers no value  

All other values work as they should.

It's not a code problem - the datafields work properly on the device itself.

Does anybody know, what's happening?
Is the simulator a part of Monkey C extension?
Should I remove Monkey C Extension fromVS Code and re load it?

Thank you!