Apple Users

My guess is that your problem is bluetooth related. Latency issues occurred more often with Bluetooth 4.1 and earlier, from what I can remember. If you are using differing versions of bluetooth among your three devices, that could be your problem. I don't know, further, whether the cutting out of your sound has the same cause as latency, but my guess is that they're related. I have latency problems if my receiving device is using Bluetooth 4.1 or earlier. If it's using BT 5.0, I'm okay. But you don't know which device is causing your problem anyway, so I'd troubleshoot the issue. But first, make sure all of your devices are up to date (may not be possible with older iPhones or older MBPs), then start swapping out the MBP with another more recent laptop, then do the same with a more recent version of the iPhone, etc. I don't know anything about Azpen docks, but you may have to swap it with another Aspen dock that's more recent. See if there is an update or firmware upgrade for the Azpen. That might help.