Make sure you are using high quality thread tape. Sometimes the cheaper stuff will leak and case issues. Also check the O ring seals inside the female quick connecter. If they seem worn or torn replace them. Keep in mind if you are using hot water find the brown O ring seals. They seem to last a little longer and are a little tougher in material strength. Most importantly, allways keep a small dental pick, two large adjustable wrenchs, tread tape and a big assortment metric and imperial O rings with you in the truck. Plus it doesn't hort to keep a few male and female quick connect with you in the truck. Better to be prepared when in the field rater than packing up to get a 99 cent O ring.
DAFF