Hi,
I’m using the RWML stack for my multilingual TCMS blog page.
I have figured out that if the BlogList stack inside RWML is working with GalleryImage, but not with GalleryImage (F6). This issue can be fixed moving the BlockList outside RWML (which does not really arrange me).
I can live with GalleryImage (not the version F6), but in case someone could fix it, it would be nice. 
Hi @zdenek Maybe you could contact William Woodgate at Stacks4stacks (RWML is one of his stacks).