I don’t think @DannyQ experienced any issue afterwards. He did mention he was going to try and use an extended USB cable on the auxiliary port to power a V4, but he never got back to update his findings. Having said that, @bassoprofundo did experience some issue with the secondary USB port in that thread, but it is likely his Floodlight V1 could be defective or dodgy power source.
Furthermore, I was previously using the auxiliary USB Type-A port to power an extra V3 and I did experience some issue only when using 33 feet long extended USB cables which I noted below. The main V3 camera on the Floodlight V1 had no issue at all.
@SlabSlayer did some indepth testing on the auxiliary USB Type-A port of the Floodlight V1.