Flyte Slack pack not listening after archive & unarchive

[lindgren]

Background
Flyte slack had joined hcom-xyz-deploy
Someone archived hcom-xyz-deploy
Someone unarchived hcom-xyz-deploy
Flyte Slack pack was unresponsive in hcom-xyz-deploy even after flyte join was used
Flyte Slack pack had to be restarted for it to operate in hcom-xyz-deploy as it did before
We suspect the Flyte Slack pack go routine that listens on the channel may have exited - the Slack pack application itself did not exit.