Bluetooth Info signal strenght

Hi.

I have task which lists all paired devices (currenrly there is 2) and their signal strenghts using Bluetooth info. So good so far. First device is honor band 5 and it displays signal strenght between -32 and -120. And second device is sudio tio Bluetooth headphones, the problem is that displays its signal strenght between 0 and 20 so what the heck is going on, that doesnt look like right value to display. I installed some bluetoorh signal strenght app and it displayed right rssi value so this must be tasker related problem. Any idea whats going on?