2005 Honda Civic - Interior electronics shut off intermittently while driving

My fiance’s 2005 honda civic has had the interior electronics shut off while she was driving on a couple of occasions (weeks/months apart). I have not been able to reproduce this or been around to witness it happening.

Symptoms on occurance:

-guage cluster shuts off, no lights, gauges read zero

-radio shuts off

-climate controls shut off

-turn signals blink at an accelerated rate as if a bulb was out

-possible loss of power steering (I’ll have to confirm this with her

Last year I replaced the starter, alternator, battery, and engine grounds. The car had run fine until last week when the interior electronics shut off again while she was driving.

I have checked the following:

-engine grounds

-battery voltage and alternator

-all of the interior wiring grounds that I could access
without tearing apart too much of the dash

Could this be a problem with the ignition switch? Should I tear into the dash further and check the grounds behind the guage cluster? And are there any other components or connections I should investigate?

Any help or pointers would be much appreciated.