In this specific shortcode the number of the items is always three and cannot change.
It is strange that in your case it shows four… have you made any changes to the source?
I’m 99% sure that is not related to the theme, most probably after a plugin update, something broke.
You need to set debug to true and see the exact error.
If you need further assistance please send us an email to support (at) pokatheme.com
Exactly AMP in PokaTheme works just fine!
Also with PokaTheme you don’t need Poka Review plugin and we always suggest avoiding it.
The plugin is made for themes lacking affiliate functionality.
Your theme should be compatible with AMP in order to work.
Poka Review Plugin is just a plugin that generates shortcodes.
For example our themes like PokaTheme has AMP support.
We tested Yoast + PokaTheme + WordPress in their latest versions and there is no issue at all.
Please try deactivating all the rest plugins you might have until you identify the conflict.
If the issue persists please send us the version of WordPress/PokaTheme/Yoast you are using.