Health Mate IOS kills the exercise after 1 second

I was not able to track my running with my clock and heal mate yesterday. 

I started tracking from clock. Was not (once again) able to connect to the software, so while running I started the Health Mate. It managed to found my clock and immediately there was info in my clock that the run was Finished.

While running I restarted the run tracking from the clock and after 1 second it said Finished in the clock and exercise was completed.

I tried this with several times and always the result was the same. I tried keeping the Health Mate program open in front and also in background. When program was in front there was brief moment when I saw the normal exercise window with time and distant info open and the in disappeared after 1 second.   

I also kept about 15 min pause between attempts to start running exercise from the clock but still same result.

This morning I tested the starting activity, but still the same result.

Now I restarted the application (by swiping it away) and now it started to work.

I have had similar issues before. Only those times I have just started e.g. cycling and after a while I have noticed black screen in clock to realize that noting has been tracked. 

Healt Mate IOS 5.1 

iPhone 11 IOS 13.6.1 

Steel HR Sport (latest update 6981 9.9.2020)