I was able to fix my issue, which was due to problems with the wiring. In my situation, I was putting the HS200 switch into box that held 4 switches, i.e. I was replacing one of the 4 mechanical...

Part of this description is happening to me as well, specifically "After the installation the lights just flickered (fast)". I only have one switch, which I've swapped with a HS200, to control two...