It seems that this has been fixed for 4.27: Unreal Engine Issues and Bug Tracker (UE-109511) - if you use a source version of the engine, you can merge the fix in 4.26.
It seems that this has been fixed for 4.27: Unreal Engine Issues and Bug Tracker (UE-109511) - if you use a source version of the engine, you can merge the fix in 4.26.