Working on a project for my Burning Man camp and I am running into the same problems on this and another project. The project uses a 5v 60A power supply and 11 ws2812b strips with an arduino nano powering everything. When powering everything up, sometimes it works - sometimes it does not. Re-plugging the 3-pin connectors usually fixes the issue.
I have nothing inline here. No caps. No level shifters. Ideas and advice on how I can troubleshoot and fix this in the coming weeks is greatly appreciated.