I am adding a bunch of printers in. I used the import, but since ALL the information I need can't be done through the import I've been manually updating Network, IP, and MAC among other fields. All others fields are saving, but not those three. This includes the URL field on that same form, and fields from other tabs in the asset.
I've been able to confirm that this is affecting Printer asset types, but not Server. I haven't exhaustively tested all types.
EDIT: To update this, it only seems to affect assets I've imported. Assets I've manually added update fine.