Why is there extra space in my scrolling frame?

I have a frame with vertical scrolling, the inner frame is sized exactly double the height. However in my prototype it seems to ignore this and adds which space at the bottom. Any idea how to stop this?

I have seen something similar on here but can’t figure out how to make this work for my issue.

Figma file: https://www.figma.com/file/VCptOTaZa93DEqUxAS8ot5/Help?node-id=45%3A8555
Prototype: https://www.figma.com/proto/VCptOTaZa93DEqUxAS8ot5/Help?node-id=45%3A8555&scaling=scale-down&page-id=45%3A3239&starting-point-node-id=45%3A8555

Thank you!!

*White space

not which