Issue:

Newly bridged groupchat, made by double-puppetet user (matrix-login), Matrix to Telegram messages comes from relaybot instead puppeted user. No sync commands nor cache clears resolved this, but restarting of bridge did magically corrected it, so some form of "state of things" discrepancy somewhere I suspect. Nothing suspicious observed on either Synapse nor Mautrix-telegarm logs. Also saying something with real Telegram client resulted in correct behaviour (matrix-puppet saying things in room).

Flow that I happened to use, should any part of it affect somehow:

• Made Matrix room
• Made Telegram group
• Invited some TG users on TG side
• Invited bot both sides
• Executed bridging commands
• Upgraded room to supergroup through bot command
• Talked and observed this behaviour

Bridge version: d5470de