Inflight entertainment and downloaded movies.

hello. VERY new to bitdefender.
When I travel I like to connect to inflight entertainment on the airline wi-fi and their app to catch a movie. Bitdefender does not like me doing this. I had to crawl into the bowels of my setting to turn off a VPN setting (don’t know much about this) which seemed to remedy it but made me nervous.
When next on other wifi I downloaded a couple of movies from Netflix for the flight home. Just my phone I thought, it will be sweet. Movie kept cutting out every 2 minutes or so, until I went down the vpn rabbit hole, wifi and turn off flight mode. It was quite messy.
The upshot is that I’m wondering what have I missed to have both scenarios run smoothly?