Update site shows misplaced notices

Didn’t know where to put this but since my WP is a multisite…

Since few weeks I noticed that the process of plugin or themes update doesn’t return correct info.

I would post a screen, but I don’t see the way to do it here, so I try my best to describe it:

On the top of update page I have sentences like: unpacking of actualization, installation of the newest version.., actualization finished, etc.

Then I have some marked info with “actualization complete: show details”

Then I have info: Actualization of the plugin XXX (2/4)

What is weird, there is no info about 1/4, it starts right from 2 and then goes up.
After all plugins (3/4 and 4/4) I have:

Turning off from conservation mode…
All actualizations were made.
Go back to plugins. Go back to actualizations.

More or less it all looks normal. But then it gets weirder.

Below it I have:

Process of actualization has started On some servers it may take a while (this info seems to be misplaced..)
Turning on of conservation mode (again: misplaced line)

Actualization of the plugin XXXX (1/4) – next to it is a spinning circle that doesn’t ends, it stays that way indefinitely although updates are over.

It’s not a big deal, because basically everything works well, although this is a sign that something is wrong. It shouldn’t look like that.

I use wordfence plugin, so all files are up to date and cross-checked with the original files, unless it can’t check missing files?

Should I copy/overwrite newest wordpress version or maybe the problem is somewhere else?
It all looked well till recently.
Thanks for the answer

Mike