Hello Nathan,
Thanks for the details. What you're seeing matches a documented limitation with Last Agent Routing (LAR) for email.
LAR does not work when emails are routed through an Architect email flow-it is only supported when emails are routed directly to a queue. Additionally, enabling Preferred Agent Routing on a queue disables LAR for that queue.
Your supported options are:
Enable Preferred Agent Routing if routing back to the last agent is not required.
Use Preferred Agent Scoring in your Architect flow by passing agent/score pairs to the Transfer to ACD action. This provides "sticky" routing behavior while remaining compatible with email flows.
Route emails directly to the queue instead of through an Architect email flow if Last Agent Routing is a requirement.
I would avoid attributing the "stuck in limbo" behavior directly to this documented limitation unless you've confirmed it through a support case. The documented limitation is simply that LAR is not supported when an Architect email flow is used.
Hope this helps!
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Cameron
Online Community Manager/Moderator
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