Google Remove my AMP Pages

Hello.

I using this plugin to some of my page. But starting this year, there’s some problem that I don’t know what the cause.

Last year google index all my AMP page, and it show at search result fine.

But in the middle of January this year, google remove the AMP page every single day, that in end of February, there’s only 1 valid AMP in google search console Enhancements AMP dashboard, which is AMP home page.

So I try to move and redirect site to it’s new sub domain. After the redirect done, I register the new sub domain at google search console.

At the start, the AMP page of new sub domain start indexed well. But at 15 April, the google starting remove those AMP page AGAIN ?? from Enhancements AMP dashboard, and again, only homepage is the remain valid amp.

So I just curious, what’s happens?

One more things, not all of my AMP page is cache by cdn.ampproject.org

Is themes have something to do with it? (I’m using genesis studiopress theme)

The plugins that I using are:
-. Classic Editor
-. Disable XML-RPC Pingback
-. Genesis Grid
-. Genesis Simple Edits
-. Loginizer
-. Redirection
-. reSmush.it Image Optimizer
-. TinyMCE Advanced
-. W3 Total Cache
-. Wordfence Security
-. Yoast SEO

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