UI ++ - Apply Network Settings - Domain join not working

Tried this out today for kicks, couldn't replicate, will need more information on the rest of your implementation, maybe something TS related and how it's consuming the OSDComputerName variable?

Here's a section of my script, we tightly control workstation names as you can see, with a check if imaging a virtual machine, and then uppercase the whole thing for visual preference. 
Anyways, this joined domain correctly with the Hypen, you can see the screenshot for the hostname used. 

<Action Type="TSVar" Name="OSDComputerNameVM" Condition='"%SystemSuffix%" = "V"'>"%RegionPrefix%%ZZBuildID%%ZZComputerName%%SystemSuffix%%PartSNVM%"</Action>



<Action Type="TSVar" Name="OSDComputerName" Condition='"%SystemSuffix%" = "V"'>UCase("%OSDComputerNameVM%")</Action>