Nope, it the notifications When you swaped them in mobile, they are INSTANTLY added to watch later Idk if it is a bug or not but is ANNOYING Like, i try to put a song in my playlist just to be put there becase of "recently added"
Yep, mobile youtube bugs are weird, some of them happen randomly and some of them are fixed, then introduced again, like in fallout 76 style For example there is the famous "shuffle bug" where it destroys it