Persistent subscriptions unavailable

Hi, today I noticed that all the sudden all persistent subscribers were dropping their connections, after further investigating, I noticed that trying to get the list of persistent subscriptions via the API (http://localhost:2113/subscriptions) results in 503 (Service Unavailable), obviously I see none of the persistent subscriptions via the admin UI.

Has anyone experienced this before ?

We have a cluster of 3 nodes, version 4.1.0.0 running on Windows Server 2016.

Thanks,
Javier.

Same here - single node - 20.6

Could you both provide the log when that incident happened, if possible?