I think you might be right. Still trying to figure it out, but it looks like Autoptimize was not the problem. Thanks, Frank
By “disable you page cache” do you mean disabling it in the browser?
I did try it in Chrome. Then I I deactivated the plugin. And it once again broke some pages… This is the example of https://annamystory.com/about/ page – https://pix.my/D0ePr0 how it looks with plugin deactivated