Hammerhead True Wireless Connection Problem

Meraklija
Left working right not what i can do to fix prob

Can you fix the problem? ??

I have too a problem with my razer hammerhead. I bought them today.I changed the case with the earbuds inside it. I downloaded the firmware update, then I connected it to my laptop (IdeaPad L340-15IRH 4.2 Bluetooth) and I listened to music normally ( I had the application opened at my phone. I disconnected the earbuds and then I tried to connect it to my phone (Xiaomi mi play) I heard music for some minutes and then one of the earbuds ( the left one) disconnected. I tried to connect the earbuds to my laptop again and I have the same problem.