Mobile redirection fails until clean cache

Hello,

I use the plugin https://wordpress.org/plugins/wp-fastest-cache/.

I have correctly set the mobile redirect option from the configuration page and allowed AMP for pages too.

Image: http://imgur.com/a/GEfUr

When clean cache the mobile redirection starts working again. Need to do this from time to time.

Should I edit some configuration in the Fastest Cache plugin?

Thanks

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