Can’t post with iPhone X – Plann: Preview for Instagram Review

New user here. Got everything setup and just received reminder for my first post. Great! I click the photo and then select “copy to Instagram” I am them presented a dialogue, but the “next” button is floating at the top of the screen of the iPhone X, behind the WiFi/battery level icon. I’ve never experienced something like that before. I can’t click it and therefore can’t post to the app, so unfortunately this app is useless to me. Is this something all iPhone X users are experiencing?
Review by jakobox on Plann: Preview for Instagram.