Reproducible in:

pip freeze | grep slack
Python 3.12.10

The Slack SDK version

pip freeze | grep slack

Python runtime version

Python 3.12.10

OS info

#225-Ubuntu SMP Fri Jan 10 22:23:35 UTC 2025

Steps to reproduce:

1. use the sample from offical site https://tools.slack.dev/python-slack-sdk/socket-mode/
2. kill the tcp session(websocket) between bot and slack sever by tcpkill or iptables or something else
3. wait for auto reconnection
4. after that the bot will receive event notification no more
5. a workaround i figure out myself: after this happens, use client.web_client to do something, query a channel history or post a message to a channel, then the event notication works again.

Expected result:

everything goes well after auto re-connection

Actual result:

no more events notification after that