It doesn’t change anything. I have cleared the cache of Autooptimize, all cache of WP Rocket and the CSS cache of AMPForWP. Then set to “Show” in the post and saved. Now it is back to “Hide” afterwards.
The only thing I did differently with this post: I set it to “private” before publishing.
After I was done, I set it back to “public”. Could that be the cause?
Is there a logfile or database log I can check? I can’t see any error messages in backend. Only a redirect to the original page, if I try to open with /amp