.... Is this a clean the connection first step, then call Davis? Seems kind odd for the humidity sensor to crap out this quickly.
Yes it is odd for a new station but like all things there is a failure rate, nothing is 100% perfect and humidity sensors do have issues in bad environments. If it's a moisture/humidity/temperature issue then this might become evident observing when the issue occurs over a time frame.
But yeah clean/check the ISS socket & fully re-seat cable jack a few times and check for any signs of moisture. Don't worry if there is some form of dielectric grease on the contacts, that can be normal.