Yes, the project file and a screenshot should help. Also knowing what version (web or downloaded) and OS you are using.
I use the download version and I'm on Windows 10. When I load back my project, the scrollbar is always gone, but I just noticed that the scrollbar re-appear when I move an item from one of the lines thats filled (that goes over the screen edge). However, it doesnt restore the scrollbar when moving other items, in lines that are not filled.
Here's the project: LINK
And screenshot (without scrollbar):
357 days ago(+1)
Thank you for the detailed report, I will look into this and try to solve this bug within the week.