I have a newly assembled SSCv4 controller that is not functioning properly. When I test using Xlights on the Test tab, it flashes OK with speed set to 50. Any faster than that, it begins to lag a fraction of a second on every other color change. For example on R-G-B, red is OK, green lags, blue is OK, then red lags, and so on. I'm positive the problem is with the controller and not anything else because I've tried switching components and it's always with this controller. I've tried reflowing the solder joints, but it still happens. Any advice on troubleshooting is appreciated. I have a megatree with a star and have moved this controller to the star so the lag is not as noticeable, but would still like to correct. Thanks!