Menu resets/changes after saving post

Every time I save a page or a post, my main menu resets to some kind of default. Yet, it seems to display random items (1-3). I have to manually change the menu each time, add and change the order of the pages.

I have tried to add an extra menu and I’ve deleted all menus. Problem keeps happening… It started on theme Elara, then I switched themes to test if the problem originated there. Now on OceanWP, it’s still there.

WP 5.4.1

It already happened before I had W3 Total Cache installed.

Any ideas are welcome!

The page I need help with: [log in to see the link]



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