I have an 08 Fender P bass with some dadario xl flats on them. I never had this problem till recently but my A string pops out of is nut slot sometimes during songs and I pop out back in while i continue playing but i don't understand why it started doing this. I don't think i have changed my finger attack as i usually am pretty light on my touch. I was thinking of changing the strings to ghs precision flats but wondering if its the nut. Has this ever happened to you and what was it? Strings, nut, or attack?