Disapearing row in app structure when padding is set <div class="row mb-1"

Wappler Version : 4.1.1
Operating System : win 10

sometimes disapearing row in app structure when padding is set <div class=“row mb-1”
sometimes changing type

changing type see picture s

removing mb-2 see picture

Disappearing row with mb-2 set

appearing whitout mb-2 or 1 or 3 or 4 dosen’t matter

funny bug