Hi Michael
One peculiar thing I have noticed on V5 vs V4 is if I sweep a circle around a sweep rail to make a solid pipe

Then hide the solid to show just the curves , show points on the sweep rail and move any of them the solid remains hidden but when you unhide the solid it has been changed

In V4 if I alter either the oval or the sweep rail it unhides the solid and updates the it immediately.

I have attached sample

cheers
shayne