Why is recording alt

Hello,

It’s not from the plugin itself, but maybe from inside the core, or added by some plugin. You can check it by yourself that plugin adds nothing new to image https://github.com/zviryatko/menu-image/blob/master/menu-image.php#L318
As I understand this alt is a title of the page where menu item link leads on.
You can remove it by using some filter, like wp_get_attachment_image_attributes, see wordpress docs and tutorials on how to do it (you need to code a little).

I did a check by disabling each plug-in separately, but this did not help, and the headers that he opiates, and different everywhere, these headers are in the records and tags, but why he shows them and writes them in the alt and title attributes in your plugin, i can’t understand wordpress version 5.x

By the way, if I turn to the page of some other post, record, the text in the atl and title attributes of the icons in the menu changes

Normally, alt should appear only when you type it in the media library (please re-check do your images have alt field filled in media library), but I bet that reason in some theme modification.

I reloaded icons, checked, empty everywhere

On other sites with the same theme, there is no such problem.