No luck yet, it's an Airtronics MX-3X which has adjustments for everything and everything.

When you say 100% on end points which specifically, I cleared all the settings to a standard default on the radio to make sure nothing I set was odd.

I read a couple old threads that say this delay may be normal while the ESC energizes and figures out where the rotor is. I have other sensorless ESC's that do not do this though or at least at a level so low I can't tell.