Mattias_ASUS@Mattias_ASUS Thank you for your answer. I restarted the phone many times, I uninstalled Spotify, cleared cash files, nothing helped .. It happenes on both normal phone calls and other apps calls .
I think I know what the issue is, this is a very common Bluetooth issue since it can't runt high quality audio and mic at the same time wireless, this happens on pretty much every bluetooth device.
Using the microphone does limit how much info can be passed through bluetooth, which is one of the downsides of the technology.
Have you tried entirely closing the apps that use the headphones?