When Apple releases a new OS, they certainly don't need to tell every manufacturer what they are changing, or why, or how.
The latest firmware for the 3025 is this one here.
I don't know if it will fix it, but I don't think it will since Apple dropped SMBv1, and the printer doesn't support SMBv2 or SMBv3. The full details on scanning are here.
You can call Xerox and ask them to update it, or at least to confirm it doesn't or shouldn't work in 10.13.4 and up.