6x Sapphire with Polar H10 (bug?)

Took my first run with the watch, I've paired my Polar H10 chest strap to the watch, but when I chose the Run, the chest strap did not connect. I've entered Run settings, the watch found the H10 again, but under another name, I've tried to connect it, it clearly showed that is connected, but the watches Hr monitor didn't stop. During the run I had the watch Hr monitoring my run, not the Polar H10. Is it a bug?