This is indeed very interesting. I can reccomend asking the telecom company that owns the line with a quick email as to whats going on here, they usually like to answer such questions. Maybe post in a sub thats more familiar with mechanics/electronics or even general asklemmy?
Firms that sue you because you download copyrighted material don‘t sue you because they sniff your internet traffic contents, but because you appear on the tracker peer list. Ony public trackers this is easily visible, on private trackers it‘s not since you need access to the tracker in the first place.