I’ve swapped the needle to the same cartridge Ortofon Red thinking I was going crazy. Checked alignment all is fine. I was playing my 2014 Please Please Me Mono from original analogue tapes. I noticed I can’t hear the very mild bass drum as they sing Please pleassssssee me oh yeah like I Please you.” Its not on the CD versions but I heard it on this LP before. I have 4 copies and same thing on another copy. My question.. I play records all day everyday, probably 10-12 hours a day average. (Don’t sleep much.) I had the same thing and I used that same song as a test. I suspect worn stylus because that part of the music came back after changing 5 weeks ago. It’s also been used on different turntables after a week of using bad tone arms that twist around. Thought my Please pLease me was worn or damaged until I played a different copy. I know some keep their stylus for months!! However is this normal for EXCESSIVE play like me? Or am I doing something to wear it out faster? Has 350 hours at least.