IES Profile recognised but not showing.

So when I plug in any IES into any light it recognises that its been applied but only intensifies the existing light… doesnt show the IES texture what so ever (I’ve tried engine content samples too with the same result). Running in 4.18 I’m getting this issue, in older versions Im having no trouble with the exact same IES files working absolutelty fine so its truely driving me insane!

Any thoughts on why this would be happening would be great!