By working through each line in the 6 files I edited today commenting them in/out one at a time I’ve determined the following to cause the issue.
WTF.h
UFUNCTION(BlueprintCallable, Category = "Appearance")
void SetColorAndOpacity(FSlateColor InColorAndOpacity);
WTF.cpp
void UEnhancedRichText::SetColorAndOpacity(FSlateColor InColorAndOpacity) {
}
If i paste that into notepad++ there aren’t any non-renderable characters i can see.