I have set up a booking form within a new page. I guess it is displayed in an iframe.
Whenever someone clicks on the date ('I am available at or from ...') on the first booking page the higher half of the date picker shows up for about half a second and immediatelly disappears again.
What can I do to ensure it is displayed carrectly on every browser?
I am using Google Chrome on MacOS 10.12 which isn't very exotic.