I can't drown

Normally not drowning is a great thing but tbh it feels like cheating, in 19w36a when I go under water the bubbles appear like normal and go down, but when they run out, nothing happens, I can swim forever. I've been experiencing this for a few days now and figured it wasn't a one time glitch. 

to replicate, simply go underwater and stay there till your oxygen is depleted.