[Q] Bluetooth headset problem topic

Hi all. I have an bluetooth headset nokia bh-212. It's old, but stll working good. So, i have been paired this with my Motorola Moto G XT1032 and Android 4.4.2 GB Stock on it. When i turn off display, i have every 60 sec. reconnect with my headset, it just lost signal and connect again. When moto g isn't inactive (display is turn on) - its good, no reconnects. Also, when i'm talking via headset there is also no problem.

How to fix it?