Is it normal that all parenting structures of a component is inaccessible if a slot children is contained?
For example this blockQuote component has this horizontal stack to control its background color overwrites, and within the stack there is a slot (freely editable texts). But in the instantiation the horizontal stack and everything is gone, it just the slot that remains, so I can not change the background color of the box anymore
I remember it wasn’t like this before, I could be wrong, but is this the intended behavior or?
That is intended, since when you instantiate a component you can only change slots, props and variants.
To be able to edit the horizontal stack you could transform it in a slot, or if you just want to be able to choose among some specific background colors you can create a variant with a different color (or a VariantGroup with the color options)