I have two Pixel 9, a Pixel 8a, and a 6a running GrapheneOS, and I regularly use the call recorder function. Unfortunately, I have the problem on both Pixel 9 devices that during longer phone calls, with the call recorder enabled, I cannot understand the other party approximately every 2.5 minutes. It seems as if the call recording process temporarily prevents me from hearing the other party for about 3 seconds. Changing the audio output format from MPEG4 to AMR unfortunately does not help either.
No problems with Pixel 6a and 8a. Anyone else relate to this issue?