Can the switch work if it is disabled according to the logs?

Question

System administration

Good afternoon! Sorry if I'm wrong in the terminology, I'm still an admin larva.
Foreword:
I have been in this job for several weeks and inherited the current infrastructure.
The Internet at work is organized by the following configuration:
Mikrotik RB-951G
2 switches are connected to it,
in 1 port - Hp 1920 8g + PoE
In port 3 - HP 1920 24g
7 access points are connected to the PoE switch in ports 1-7, 8 port in Mikrotik
To the 24 port switch, Unifi CouldKey is enabled on port 16, Mikrotik
connects 1-3 ports through the bridge into bridge-local, addresses are distributed from the pool 192.168.10.0/24
Actually history
When I arrived at work, the 1920 PoE switch's web interface was not working. There was no cord for connecting the console, so I didn’t touch it and reboot until I got the last one. IP address 192.168.10.9 was reserved for this switch in the DHCP table of the Mikrotik server, but there was a hole at this address and it was not displayed in the Leases table.
Yesterday the light went out in the office for about 30 minutes, after which the equipment restarted and the e-switch came to life and opened the web interface door. And it seems to be cheers, but after a few hours both switches turned off,
HP 1920 PoE is DOWN
HP 24 Ports is DOWN,
After that, for 10 minutes, they periodically turned on and off, but the Internet worked more or less stably only after 10 minutes when both switches turned on .
After this incident, the Internet as a whole works stably, but the Mikrotik log is polluted with similar messages:
Hp 1920 PoE is DOWN
HP 1920 PoE is UP,
This happens with a random frequency, maybe 3 times in 5 minutes, maybe once every 2 hours, while the Internet exists and does not disappear.
The laptop from which I'm sitting is connected to the access point that is connected to this switch, the ping does not sag.
Did I say that all this stuff is connected without an uninterruptible power supply? :)
Additionally, the access point connected to the 1920 PoE switch is buggy, sometimes it hangs as Connected, and sometimes it turns off and goes into Isolated mode (temporarily decided by setting it up as a repeater and it doesn’t turn off at all, but goes into Connected Wireless mode).
Essence of the question:
I ordered a bespereboynik, I want to completely eliminate theoretical problems with power.
1 - Regarding the switch, what could be causing it to turn off in the logs, but everything works? Should a switch be considered dying?
2 - I want to put a PoE switch on 24 ports instead of a switch for 8 ports, since the task is to add more access points and add the ip of the camera. I was choosing between Ubiquiti EdgeSwitch ES-24-500w and Ubiquiti UniFi switch US-24-500W, what is their difference? And which one is better for my purposes.

Answer 1

1 - Regarding the switch, what could be causing it to turn off in the logs, but everything works? Should a switch be considered dying?

This may be the switch's reaction to loops in the network. That is, a loop is detected in the network - the switch detects this and disables the port. Well, from time to time the loop suddenly breaks (for example, by downing the port on another switch) and the port of the first one starts working ...
And loops ... loops can occur, for example, when you turn on a laptop at the same time via a cord and wifi, or when a half-dead built-in wifi comes to life adapter that was "replaced" by inserting usb-wifi

Answer 2

Do you have a Mikrotik as a client that does not cling to the wireless, purely by chance? And then if it clings to one of the points as a client (which is a little unusual), and is assembled into a bridge with wired ports (which is usually configured by default), then a loop can take place. From here and such behavior of ports - inclusion/switching off.