I sent feedback via Office 365 as well since I have added storage through my Office 365 subscription. This is an issue I ran into while collaborating with a consultant.

Fix OneDrive to make it useable in real life, not in a world with DOS file names!

Basically, a terabyte of storage is unusable to me, because it will not sync reliably. Files with filenames that are too long and files with certain characters in their name (%, &, _, | ) have to be renamed to eliminate characters that ICloud, Dropbox, Box, and Amazon can all manage! This is a service that comes with my 365 subscription, so I am paying for it but it is impractical to use. As a result, I cannot put anything of importance on One Drive.