Sorry guys. I’m not sure how this one slipped through the cracks.
It was a fairly late change we made to fix an issue with UHT not rebuilding script plugins from installed builds, and the properties it uses are nulled out when building from a UBT makefile.
The fix is on GitHub in commit 5b2a514bea74d4cb3bf0508ccecf49bba1752522. We’ll try to get a QFE up before the end of the day.