Bot sending You unsent a message in clear text.

[jtagcat]

This is with latest docker, after backfill merge.

{
  "type": "m.room.message",
  "sender": "@facebook_100008220182992:ma.c7.ee",
  "content": {
    "msgtype": "m.text",
    "body": "You unsent a message",
    "format": "org.matrix.custom.html",
    "formatted_body": "<p>You unsent a message</p>"
  },
  "origin_server_ts": 1658775895056,
  "unsigned": {
    "age": 4864
  },
  "event_id": "$5fAsku0DV4H-SFAZaNiKVOsKV7j7rZeUMTkPWEE7sCU",
  "room_id": "!OSqMTssUhXmThgdIpX:ma.c7.ee"
}

[jtagcat]

Other possible regression: Logs filled with You are not invited to this room. I'll try to investigate the not invited issue later.