I currently have Opn S, More and Real (trial). I have three ConnectClips.
I have zero problems with the Opn S working with the ConnectClip. I never have to re-pair them and the sound is reliable without any cut-outs.
Since I got the More hearing aids, I’ve had nothing but problems with the ConnectClip. When I originally got them, they had 1.3.0 firmware and they worked fine. Not long after I got them, the firmware was updated and they were no longer reliable with the ConnectClip. I tried all of the subsequent firmware releases and none of them fixed this problem. Oticon has confirmed there is a problem, but they don’t know what is causing it, so they don’t have a fix. I eventually gave up and had them downgraded to 1.3.0 firmware. They had to be sent back to the factory for this to be done. They worked for a couple of weeks, before the same problem returned. I tried them with a different ConnectClip and it made no difference.
I now have a set of Real hearing aids and another ConnectClip. Similarly to the More hearing aids, they worked for a while, then the same problem of audio cut-outs appeared.
Just today, I did a remote session with the audiologist to clear the ConnectClip pairings for both the More and the Real hearing aids. They are both working fine, with no audio cut-outs. I don’t expect this to continue.
Based on the above, I doubt the problem you are experiencing is because of the Bluetooth dongle.