Regarding the procedure to reset / clear pairings in the CC, in my experience, which was also confirmed by Oticon, it occasionally resolved the audio drop-outs, but in most cases it did not work. Also, in a very few occasions, just turning off and on the CC and the HAs temporarily fixed the audio drop-outs, but again, if it worked, it was only temporary and usually it made no difference at all.
If neither of the above procedures fixed the audio drop-outs, which was the usual case, the only way to get the HAs working without audio drop-outs was to reset / clear pairings in the CC AND also to clear the pairings in the HAs using Genie 2.
Whenever the pairings in the CC are cleared, you also have to re-pair it with the other devices. Usually, this requires clearing the pairings in the device the CC is paired with and re-pairing. (Pairing, by definition, takes place in two devices. That’s why it’s called pairing.)
As for why your HAs have not required clearing the pairings using Genie 2, I have no explanation, other than you should consider yourself fortunate. Perhaps Oticon can explain why this happens, but whatever the reason is, it’s very technical and probably only the hardware / firmware developers understand it, because Bluetooth is very complicated.