Changing a neutral unit to an Empire unit does not change the skin

Operating System

    Windows 10 Home 64-bit
CPU
    Intel Core i7 6700HQ @ 2.60GHz    47 °C
    Skylake 14nm Technology
RAM
    32.0GB Dual-Channel Unknown @ 1197MHz (17-17-17-39)
Motherboard
    Alienware 0FG0DK (U3E1)
Graphics
    Generic PnP Monitor (1920x1080@60Hz)
    Intel HD Graphics 530 (Dell)
    NVIDIA GeForce GTX 1070 (Dell)    49 °C
    ForceWare version: 378.66
    SLI Disabled
Storage
    931GB Hitachi HGST HTS721010A9E630 (SATA)    33 °C
Optical Drives
    No optical disk drives detected
Audio
    Realtek Audio

This is a very easy bug to replicate. Simply open the map editor and place a neutral Empire unit (the unit is neutral but selected from the usual Empire faction, such as a vanguard). Right-click on the unit and change it to an Empire unit. The unit now belongs to the Empire faction but possesses the same skin as the neutral/underlord version.

Before:

After:

I was informed that no output log is necessary because it is easy to replicate.