I've got Twenty Seventeen in reader mode, editing the default "Hello world!" post in the block editor, hitting "Preview" button will display the post with it's changes, but if I hit the new AMP icon next to the preview button, then it will navigate correctly to ?preview_id=7&preview_nonce=51e7746d07&preview=true&amp=1 but the page doesn't contain the updated changes in the post content.

If I revert the post to draft then the preview works correctly.

This wasn't an issue before AMP plugin v1.5 afaik.

Anyone able to reproduce?