Yes, my guitars are always kept at 40-60% RH, I use Oasis and/or Music Nomad in-case humidifiers, and I have room-hygrometers (ThermoPro) and Oasis hygrometers in all four cases.

I've owned five Martins, three Lowdens, a Collings, a Brook, and a McNally over the past twenty-five years, and the D-18 is the only one to have had this problem - as I said earlier, it's a known, well documented glue problem with Martins built since 2012.