Home assistant Pinging but cant enter or ssh

I am running Home Assistant OS (HASIO) on a Raspberry Pi 4.
Over the past two months, the Home Assistant has become inaccessible three times, both locally and via SSH, although it remains on the network as I can ping it.
It only recovers after I restart the Raspberry Pi. What could be causing this? I need stability because when I am away, I cannot perform a local restart.

have a look here.

Certainly, the power supply is of good quality, it is the original one compatible with powering SSDs. It is this one: Argon ONE Type-C Power Supply.

The power supply checker is active, but I see that it is not recording anything:

Also im protected with AVR UPS

Just a tip, but do not trust a power supply just because it used to work fine.

But without some kind of log its going to be difficult to help.