2014 Union Force washer issue
The 2014 Union Force has nylon washers under the screws on the straps. I notice they either changed part or something the washers are way too thick. As a result, the screws would loosen themselves when you rotate the straps.
I simply removed the washers and tightens the screws. There is a bit of play on the straps but at least the screws are not backing out anymore. Kinda weird for a company like Union.