Respawn Anchor can explode underwater and fire can somehow stay underwater for a while

Respawn Anchor can explode underwater and fire can somehow stay underwater for a while

 

Once filling the Respawn Anchor with all glowstone in any of the worlds than the Nether and right clicking it, it will explode also while underwater, which can cause fire somehow to be underwater, but only for a certain amount of time which is kinda long.