Hi all and thanks for the suggestions.
I did a Clear Config and restest - no change.
I did buy it from R&L January 2023, so doubtful a clone.
I did NOT do a SelfTest right before updating firmware, so can't say that the update was a factor. Seems doubtful.
I may have damaged it at some point in the past year. Not sure how I can tell.
I've attached a pic of the Version page as suggested.