Strange sensation in my ears during transition

This happens a lot. Like for example yesterday, I was enjoying my hypnagogia, visualizing the earth trying to decide where to start dreaming from. No vibrations were present. I started drifting, I was so close and then "WOOSH". The feeling is very close to "blowing when holding your nose to open eustachian tubes" and "wind blowing in my ear". And I noticed something interesting. When I'm transiting lying on my side, I only get this sensation on the ear which is not touching the pillow.

It disrupts my transition. Have you guys had a similar sensation?

Yes I experience this all the time. If I've been meditating a lot I will get it in my sleep and it wakes me up. I also get it any time I start to experience WILDs/OBEs. The only term I've ever heard for it is "astral noise". It can be very distracting (like I said, it often awakens me out of regular dreams) and it has almost kept me from experiencing WILDs, but I've learned to take it as a really good sign. If I hear that noise I know I am in the perfect state to LD/project or that I'm already in the process of doing it. Just relax into it.