I recently purchased a a Squier Vintage Modified Fretless Jazz. It has fretlines made from some sort of plastic. Almost all the fretlines rise a tiny bit above the surface of the fingerboard causing a definite buzz if the string is pressed in exactly the right/wrong place. Is this intended as a feature or is it a defect? Enough of a defect to warrant a replacement? I find it to be a problem. Some of the in-tune positions have the buzz and some don't, making it impossible to get a consistent tone. Thanks for your help.