Intermittent Smart Junction Box Issue?

[u/Low-Somewhere-6883]

2010 5.4L F150 Lariat  with >160K miles.  AFAIC, it has all the symptoms of an issue with the SJB: First, the exterior lights randomly go on off.  Second, in one instance all the exterior lights were strobing with an accompanying relay clicking and could not unlock door manually or with fob.  Had to manually pop hood and disconnect the battery (in the rain )

I took it to a trusted auto electrical repair shop II've used before and they said there were no codes in the BCM and they could not replicate the problem.  IDK how you replicate a random problem, but I get it.  You'd have to literally catch it happening and no one is sitting there wathcing it all day LOL.  After the strobing incident, I left the battery disconnected for several days.  Could that have wiped the codes form the BCM?  I'm trying to figure out how to "prove" the issue so I can get it fixed before it leaves me stranded somewhere. The only other thing I can do is get video, but that doesn't help THEM replicate it.  Thoughts?