There is a gap between my BURST Pro Toothbrush head and the handle, Is this normal?Updated 15 hours ago

This nifty little gap makes a big difference. It focuses the cleansing sonic vibrations directly to the head, through the bristles, and to your pearly whites! That way they don’t travel to the handle — because no one wants a tickle monster for a toothbrush.  You get a more targeted, effective clean, and a better feel in your hand!