I do exactly like you did. Create a new site, theme 2023, install plugin. Go to editor, click one template or site to edit and it shows the notices. I click the cross to close them, and can navigate in all other templates without it show again. But every time I go to editor and start to edit tadah here they are again!! So, I do not do anything different than this. I tried several ways, with other plugins installed activated, not activated no other plugins etc etc. Even different browsers. But the weird thing is that there is one ( that it is almost ready) that works just fine. And it is no different from that others I create. Headache for you, sorry!!