Apple appears to have pulled macOS High Sierra 10.13.4 for MacBook Pros with Touch ID as they currently only update to 10.13.3 when brand new.

This might be related to:
- RADAR [40110392] - MacBook Pro with TouchID Firmware Update Fails when Non Apple Branded Ethernet Dongle Is Used
- RADAR [40031097] - MacBook Pro with TouchID Firmware Update Fails when Camera is not installed