You have ticked “include translucent objects” in the reflection section I guess?
I’m having similar problems. They either don’t show up or they are black even with 12 bounces. There is a chapter in the documentation how to set up refraction in glass but whatever I set as refraction value in either specular or refraction never seems to change anything.
I turned that feature off and it looks quite good to me with raster translucency instead of ray traced glass. Reflection on the glass still seems to be ray traced.