Yes I’ve seen this before.
You need to add this to the unattend.xml file for Win10
<settings pass="offlineServicing">
<component name="Microsoft-Windows-PnpCustomizationsNonWinPE" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<DriverPaths>
<PathAndCredentials wcm:action="add" wcm:keyValue="1">
<Path>C:\Drivers</Path>
</PathAndCredentials>
</DriverPaths>
</component>
</settings>
Or where ever your install files are kept. The registry change was last officially supported in XP, and with Win7 they did keep that function in the system for legacy reasons. With Win10 that option was removed. You MUST use the unattend.xml method now.