Furniture cannot be placed under a bottom slab

[JeffP07]

Right clicking a furniture on a bottom only slab does not place the furniture but it does not send any error to the player or to console. You can place on the bottom of a top slab, or a top+bottom slab just fine, only issue is with a bottom only slab block.

server version: purpur 1.19.2 plugin version 2.8.3