I'm a direct care staff in a group home where all the residents are tube fed. This happens to me all the time. It does help to kink the tube and keep a finger over the side port(s) as you're opening...
I had a three month long fight to get Adderall that I need to function. Yes, ADHD is a real thing, and before the Adderall, I was a much worse student and CNA; I even had a harder time driving safely....