Just gave that thread a read, thanks for that Brian, but it appears they're only seeing loss between Brandmeister master servers. I have had the issue when both hotspots/repeaters are connected to the same master.
Also just encountered someone else I'm unable to hear, 2E0HOQ transmitting through
https://brandmeister.network/index.php?page=repeater&id=235144
, again using the "20191016_Pi-Star-v4" firmware. I have just created a thread on the Pi-Star forums (
https://forum.pistar.uk/viewtopic.php?f=5&t=2268&p=11064
), but any help would be appreciated, I have no idea how to go about reporting this and even less idea of how to diagnose it.