Mobs Fall Through Cobblestone Walls

cannot reproduce (or needs more info)

If I spawn a mob with a spawn egg (I'v tried villagers and creepers) it will sink into the cobblestone wall

Nevermind _{wrong ticket}

I see, yes, mob eggs do cause this, I can confirm that, thanks for clarifying. This is a duplicate of
MC-88096

ok im sorry for creating a duplicate i searched for it before but could not find it