When using the “more” tag I believe the default WordPress behaviour should be such that when the user clicks on the link and the full post page opens, the page should scroll down to where the more tag is so they can quickly continue reading from where they left off. However, in GP this does not seem to be working for some reason and there is no page scroll.
By default, clicking the .more-link anchor opens the web document and scrolls the page to section of the document containing the named anchor (#more-000). This section is where writers choose to place the <!–more–> tag within a post type.
From: https://codex.wordpress.org/Customizing_the_Read_More