[Locus Pro] Polar H7 problems

[majed]

I'm (almost) happy user of Locus Pro. This is an awesome app with endless features. I'm happy using good maps and having possibilty to design my dashboard in a cycle computer style.

The only issue I struggle with is heart monitoring with my Polar H7 pulsometer. It works correctly with Strava App on my Galaxy Note 4, both earlier on Android 5, and now after upgrade to Android 6.0.1.

When using H7 with Locus Pro it works correctly for 1-2 min, then my HRM goes down to 0 bpm (I'm still alive and wearing my H7 ;-) After 4-5 min it is up again for the short time and goes down, and again, up and down...

My config:
- BT paired to Note 4
- BT Manager in my Locus Pro identifies H7 as "BT 4.0" only, when trying as "Polar" it says can't connect

What I have done so far:
- all possible Polar H7 restarts, including suggested by Polar on http://support.polar.com/en/support/FAQs/Troubleshooting_H7_heart_rate_sensor
- unpairing/pairing several times,
- Note 4 restarts

Could you help me guys to solve the problem please?
Mariusz