That can happen if the browser window is too small, but then you should also have the scrollbar (norma, boring, system one) on the right side, which would allow you to move the whole game up and down. Do you have that?

If not, can you please make a screenshot of your whole browser page with the game running and upload it somewhere? Send me the link to the uploaded image in private, to avoid sharing too much of your haven's details with the world.

I was just notified that there is a wee bug related to this. So, if it's not what I described here, then it's a bug that'll be fixed soon(ish).