During my flight, I noticed a loose object above one of the flap fairings. You can see it in this video: https://imgur.com/wCPSEem.
Is it normal or should I notify the airline?
People pointed out to a similar question, but A) I'm not sure it's the same rubber; B) it's a different airplane model, C) the behavior of that rubber (if my footage shows a rubber indeed) is not the same, D) the other question asked what that rubber is, whereas my question is specifically about it being loose. I'm no aviation expert nor an engineer, but it doesn't feel right to me that it's loose.