Hi,
The widgets were not in inactive section, they were each time wiped-off.
I don’t have a lot of plugins and this solution doesn’t seem possible..I have mostly essential plugins for my website and in order to check it they way You said, I would have to turn them off for 1 month and that’s not really possible.
Is there any other way I can find out why it’s broken?
For the time being I have left 9 plugins running (deleted 6 that I can survive without):
Collapsing Archives
Contact Form 7
Email Subscribers & Newsletters
Polylang
Przekierowanie (redirections 301)
Simple Lightbox
Tiled Galleries Carousel Without Jetpack
WP reCaptcha Integration
Yoast SEO
And that’s it. I will report back if it happens again ??