Cortex Maps disconnecting to log-in screen upon entering boss portal.

Lost a cortex map due to this. Tested internet connection - solid. Reset router just in case. Tried logging out and back in, restarting the PC, etc... People like me that play never get these kinds of maps, so it sucks to lose the opportunity for something cool knowing there won't be a way to get it back. Better off selling the next one I suppose.