Crosstrek electrical issue

[Dvgdn]

I’ve got a 2016 Crosstrek that completely looses electrical power to everything. No start. No dash lights or instruments, no radio. If I try again later it may or may not start. Dash lights and radio flicker while driving. Battery tests good and I replaced the ignition switch. No codes set. Any suggestions would be greatly appreciated.

 

[Eastcoaster08]

I would suspect a ground