Channel permissions retained across IRC side disconnects

[andir]

Describe the bug

Users that are manually opped (e.g. not through means such as ChanServ) and subsequently disconnect from IRC they retain the Mod permissions on the Matrix side.

I believe this is one of the relevant configuration snippets:

        "membershipLists": {
          "enabled": true,
          "floodDelayMs": 0,
          "global": {
            "ircToMatrix": {
              "incremental": true,
              "initial": true,
              "requireMatrixJoined": true
            },
            "matrixToIrc": {
              "incremental": true,
              "initial": true,
              "requireMatrixJoined": true
            }
          }
        },

To Reproduce Steps to reproduce the behavior:

1. Join a new IRC channel with an IRC client.
2. Join the same IRC channel from matrix
3. set +o on your matrix identity from your IRC client.
4. Observe that you are now a Mod on the matrix side of the conversation.
5. Send !reconnect to your appservice bridge DM
6. On the matrix side you will still be a "Mod" but on the IRC side you are just a regular user.

Expected behavior Whenever the IRC connection is disconnected the permission level of Matrix users should be reset. Arguably a Matrix user should be removed from the Matrix channel when they disconnect from the IRC server (forcefully/voluntary). Especially when the server is configured with the incremental channel sync enabled.

Additional context Appservice IRC version: 0.30.0 (Looking at the diff https://github.com/matrix-org/matrix-appservice-irc/compare/0.30.0...0.32.1 it doesn't seem like any relevant parts have been touched in the meanwhile)

[unbeatable-101]

I believe this has just happened to me with the snoonet-irc bridge