There is probably something obvious i am missing here, but how do you prevent groups on a table from being broken across pages?

The top most group will always span pages, which is fine as its header repeats on each page. The Lowest most group’s header does not repeat, and the header contents are being split across pages. Is there a way to prevent this?
I am used to designing reports with SAP Crystal Reports and there’s literally a box for “Keep Group Together” and another for “Repeat Group Header On Each Page”
Thanks in advance!