the web console events don't say much - just pool wasn't available. I don't see anything that looks like a reason in the Windows event logs or sw ha logs unless I'm missing something.
The easiest way is to look at the HA tables in the Database, specifically the HA.PoolMembers table, when a server has a problem it is listed in the StatusMessage column. If that doesn't help then yes its onto logs and I'd recommend opening a support ticket.
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