Updated firmware from R7000 Nighthawk (Rev 29627) to:
DD-WRT v3.0-r32170M (06/11/17)
Linux 4.4.70 #340 SMP Sun Jun 11 12:38:55 CEST 2017 armv7l
Had issues with random wireless signals dropping, stability issues with connections. The update appears to be stable on this R7000.
Recent comments