Issues with relaying Gitter => Riot messages (some users only)

[jywarren]

We're seeing only some Gitter users' messages getting relayed into Riot now --

We're in https://riot.im/app/#/room/#publiclab:matrix.org and are linked to https://gitter.im/publiclab/publiclab with the built-in bridge available in the Riot interface. It's run for over a year (maybe 2 years?) but is no longer working. How can we troubleshoot this?

A prior instance where /no/ messages were being relayed in the opposite direction was reported in https://github.com/matrix-org/matrix-appservice-gitter/issues/72 and resolved (reported by @Half-Shot - thanks!).

This time it's /some/ users messages, not all, and in the Gitter => Riot direction.

Potentially it appears that admins are being relayed but not "regular" users, but we haven't been able to confirm this distinction!

Example in Gitter that wasn't represented in Riot: https://gitter.im/publiclab/publiclab?at=5c2e51295a0a8058be22cb4e

Message just before in Riot which doesn't get followed by the response above: https://matrix.to/#/!xGmquSnSozzjgUDBIB:matrix.org/$15465392555411088YJiFg:matrix.org?via=matrix.org&via=matrix.allmende.io&via=t2bot.io

Also I see https://github.com/matrix-org/matrix-appservice-gitter/issues/74 but not certain it's related.

Thanks! We LOVE the Gitter Riot bridge, thank you!!!