My experience has been that MOST Hamers with the Studio/Special body shape are 'weak' around the 12th fret on the G. Some are totally dead (ping...ping....thud), but most are just 'soft'. If you tune differently, the spot will follow the note, but only on that string, the B five frets toward the neck is usually fine.It's usually worse on the flat-top models, and I don't recall ever being offended by it on Artists.
I've never seen it on a Standard, nor on any 25.5 scale guitar.
I use plastic tuner buttons anyway, to help with neck-heaviness. This usually alleviates the problem, and/or moves it around.