We fixed an issue where the SocketModeClient would get confused with message events, as there are two concepts of such an event: a web-socket message, as well as a Slack event message. We've clarified this confusion, which may have led to some unexpected "Unexpected character parsing JSON" style error messages.
9d2fa584 socket-mode(fix): do not handle message events twice (#2059)
Fetched April 3, 2026