I'm guessing it is a thin layer of your wax making a pale-colored film on top as the product cooled -- a little like the blush of cocoa butter that sometimes appears on chocolate bars. This can be caused by too-slow cooling or by repeated cycles of slight cooling and heating. What is happening is the oils and fats that melt at a lower temperature are remaining too soft or liquidy for too long, while the wax is crystallizing into tiny solid particles. If this stage takes too long, the crystals of wax can migrate around and come to the surface, making the blush you see.
Some ideas:
Pour the product when it's as cool as possible yet still pourable.
Try to cool the product quicker after it is in the tins, so the wax stays mixed into the product properly while the lower melt point ingredients harden up.
For the tins you've already made, try gently heating the surface of the lip balm to lightly melt the surface layer and see if that helps the appearance.
You may want to rethink your recipe to include ingredients that are not so widely separated in their melt temperature - candelilla wax melts about 158 deg F (70 C) and coconut oil melts about 76 deg F (24 C). Consider adding a butter or other ingredient that melts somewhere between those temps. Otherwise it may be difficult to keep the product looking good over time -- think about the scenario of putting the tin in a pocket or in a purse in a warm car. The coconut oil will easily soften at body temperature, but the candelilla particles will remain solid even on a hot day in a hot car.