I recently noticed that my Fender Steve Harris Japan started to have fret buzz at specific frets. On the B note of the G string (end of the neck) it is making a loud buzzing sound, and it is appearing in the amplifier. On the D note on the same string (closer to the middle), it seems like the note has no sustain. And on the A note of the D string (near the middle of the neck), which is fretting. There was a sudden change in temperature here where I live, it was cold and now it is reaching 30ºC. I spoke to my luthier, and he said that the string might have some dents, but I didn't see any dents. I'm using Rotosounds SH77 flatwounds. Can anyone tell me if this is common for this specific model? Or could it be a change in temperature? I always leave it in its case and recently I left it on the tripod stand for a few hours...