On Load animations are triggered when the ‘project’ is first loaded. When swapping between pages (clicking or using the arrows option Readymag offers), you are simply navigating but not reloading the content.
There is a workaround you can use to force a reload, which is: when you set the Link value, instead of using one of the options they provide, paste the published URL. For example, if you want a text to open page 5 when clicking it; do not type “5” but paste the full URL (https://yourawesomedomain.com/5 or https://yourawesomedomain.com/name_of_page).