Quite the opposite for me. Windows has never been a problem when using the Xojo IDE with projects stored on LAN NAS drives.
Using NAS drives manufactured by Buffalo, Seagate and Toshiba. SMB versions 1.5, 2.1 and 3.1.1.
OTOH I have had problems with editing project files stashed on Dropbox and Google Drive. Would not recommend that practice!!!
My Linux boxes are not a problem either. Except for needing SMB 1.5 to access a couple of older NAS boxes.
macOS however, occasionally gives me problems. Leaves behind an SMB status file that cannot be deleted for a short time. Most often after a file deletion. Not sure why, but it's so infrequent I don't worry about it (one a month - maybe). The issue resolves itself after a few minutes anyway. I've only seen this issue with the Buffalo NAS drives.
The official Xojo position is that the IDE does not support editing project files stored on remote drives (LAN or Internet).
See (near the bottom of each page):