Great, mine now seems to be doing the same thing again. Been working fine for months after the repair, then suddenly yesterday I can't hear anyone unless they're on speaker.
Trying reboots, etc. but i'm not going anywhere near a device/factory reset yet. If that happens i'm convinced i'll be moving to another device. As good as I find the keyboard (despite it's quirks, and I do use it a lot), everything else seems to be letting the side down.
Can't find my original post yet, so thought would update here first.