It happened to me too while I had my bike on the repair stand. I had just finished installing the EPS components and was about to begin dialing the system in when I heard a ticking noise every time I turned the crank. I thought I had a kink in the chain (KMC X11SL) and then saw that I didn't lock the missing link correctly. After removing and re-lubing the links, I reinstalled them and the noise was gone. I've got about 500+ miles so far since the EPS install and no issues with the chain and missing links.