Reflection of static lights 'hidden in game'

I use static lights with “source radius>0”, “soft source radius>0” and “source length>0” to get a nice smooth lighting in my scenes. To avoid these light bars from showing up everywhere in my reflection captures, I check “actor hidden in game”.

This used to work just fine, but after upgrading to 4.20, the lights suddenly started showing up in my reflection captures.

Does anyone else have the same issue? I figure this might be a bug…