Our plugin loads content via ajax. So it will not load instantly. It is trigger once the js are fully loaded. To hide the button when loading, we need to customize the code. If you wish and can send us your wp-admin details at info (AATT) masonrylayout (Doot) com with this thread url, we can do it for you.
Regarding the animation, by default it is not available with our plugin. You need extra javasctipt / css and need few customization. For that we suggest you to hire a developer if you are interested with it.
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