I recently purchased a Fender standard 4-string jazz bass (mexican made) brand new from the local Guitar Center. I play mostly slap and double tap stuff. My problem has something to do with the bridge. After about 15-20 minutes of playing my g-string goes from looking normal, like this: To lowering all the way down and looking like this: I have no idea why it's happening, but it's very inconvenient when I'm in the middle of playing and fretbuzz ensues like crazy. Is this a common problem with Fender Jazz Basses? This also happens to the other strings as well, just not as rapidly as the g-string. Please tell me how to fix this!