Lost connection to HA

[BeardedTinker]

Lost completely connection with HA. System was at first very slow to respond to automation to turn lights on. Some lights didn't turn on, voice prompt failed to play.
Unable to access via web or app, with message Failed to load.
Restarting HA didn't solve the issue. All integrations responded with "loading takes too much time".
First goal is tog rt everything back up, then to try figure out what did happen.

[stale]

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[BeardedTinker]

I haven't discovered what was the issue here. Maybe some system process (as disk checks, AV check or indexing) was hogging up the Synology in such a way that HA become completely unresponsive.
Restarting of HA didn't help at that point and even restarting Synology which I do rarely.
Issue just fixed it self after few HA restarts from Docker.