UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Steps to reproduce the problem:
1. Make div with column-count: 2 in fixed height container with overflow-y: auto
2. Add 3 objects, 1st two objects 60% the height and 3rd 10% the height of fixed height container
3. Render page

What is the expected behavior?
1st object is in first column
2nd object is in second column
3rd object is in second column below 2nd object

What went wrong?
1st and 2nd object are both in first column overflowing the fixed container height

Did this work before? Yes 

Chrome version: 71.0.3578.98  Channel: stable
OS Version: 10.0
Flash Version: 

Not sure but I believe it worked back in v22.0.1229.94 (version I originally wrote a dashboard for using this css)
 

Deleted: testcase.html 780 bytes

testcase.html 780 bytes View Download