I heard from rav moshe wolfson once that chabad doesn’t grow payos because of a concern of mixing the hair from the beard with the payos for a kabalah reason, and this is a reason why some litvishe put it behind their ears(of course there’s the historical reason that it was due to anti semitism, but both can be true)
Tuna, do you have a source for those reasons re streimelich? I’ll admit that i was restating what i had heard from chabad people years ago without a textual source