Hi Mike,
I've reasched out to find the answer for you - hope this helps?
Is this observed for both mute and snooze? Here's the documentation for mute and snooze and they both work differently.
Manage the Alerts Inbox - Genesys Cloud Resource Center (mypurecloud.com)
Snoozing applies to recurring notifications of a specific alert while muting applies to all the notifications coming out of an alert rule.
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Tracy
Genesys
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