Can someone name this behavior for me please?

We recently adopted the sweetest 7 month old mutt (believed Husky/lab mix but DNA has not been tested).

Training has been going well and he's settled in happily but he heeps doing this weird nuzzling/nibling all over the place. Pillows, blankets, clothes, our skin. He's not biting, just pressing his mouth up against a surface and taking little tiny bites of air right before the object but not of the object.

Seems to be some kind of soothing tick but I've never seen it before and don't know if it's something that will pass on it's own, something I should be correcting, or if I should be concerned.

Any assistance is appreciated, ideally I'm looking for the name of the behavior.

Thanks!