If you encounter this issue, please follow the below troubleshooting tips:

1. Check the software version

Make sure you are running the latest software version. Go to the Bang & Olufsen app and verify that you have the latest version of the app as well as the latest Beoplay EQ software installed.
Please see How do I add my Beoplay EQ to the Bang & Olufsen app?

2. Check the fit

Make sure the earphones are fitted correctly in your ears. The wear sensor might register that the earphone is not in your ear, and this will result in the earphone being muted.
Please see How to correctly fit your Beoplay EQ

3. Reboot the earphones

Switch the earphones off by placing them in the charging case for at least 3 seconds. They will switch on again when removed from the charging case.

If none of the above tips resolved the issue:

External Bluetooth interference can cause such connection interruptions. Please see How do I resolve issues connecting Beoplay EQ to my device?