SeaRefractor, Jul 15, 2019 : I have a OP 7 Pro running 9.5.8.GM31CB firmware (not yet far enough along to "unlock" the device for International firmware). I am also using a pair of Samsung Galaxy Buds (had them with my prior Samsung phone) on firmware R170XXU0ASF3 firmware and version 126.96.36.19931361 Galaxy Wearable and 1.2.19051551 Galaxy Buds Plugin. I have the strange behavior of the earbuds working well for most of the day but sometimes the left earbud is silent. The communication status is shown along with the battery level, but there is no audio with the left earbud. If I power off the OP 7 Pro and boot up to the recovery menu and wipe the cache partition and restart the phone, the left earbud will be working perfectly again. Very consistent behavior and always resolved with the cache wipe. As for when it's working, I can walk quite a ways from the phone and continue to have great audio, so the bluetooth radio appears to be functioning correctly, just the left earbud acts as a volume level of 0 when the issue occurs.