There are two ways a copper chloride leach can solidify.
1. The material isn't all made up of copper, any copper chloride cements out the copper and the other metal goes into solution. The mass usually turns into a copper coloured solid clump while the solution loses all the copper and usually change colour from green to whatever metals goes into solution. Tin and solder gives a colourless solution while iron usually turn into yellow to dark orange-red solution.
2. The solution is saturated and running out of HCl, This precipitate the Copper(I) chloride as a white solid and fuses the pins together. Add or substitute the liquid with fresh HCl to dissolve the white CuCl, add a air bubbler to turn CuCl + HCl into Cu2Cl and continue the leach.
To me it sounds like you probably had enough iron based pins in the mix to cement out any copper.
Göran