Half of the materials on the site are not displayed and new ones are not added to Joomla?

Question

Joomla

Good afternoon!
There is an online store on Joomla. Half of the materials are not displayed on the site, in the catalog of half of the goods, although they are in the admin panel and are published. Also, new added materials are not displayed.
But if you follow the link in the address bar to such material, it opens.
Clearing the cache didn't work.
I compared the settings of the materials that are displayed and those that are not, there is no difference.
I noticed another strange feature: as soon as I turn off one of the displayed materials in any section of the catalog, one of those that was not displayed before appears in its place. It is worth turning it back on - everything becomes as it was. Content is always displayed no more than any amount that was in that category at the time the problem started.