One of my contacts in Gmail has lost its associated notes section, and I don't know why.
All the other data in that contact is fine, only notes was deleted. I check other notes, especially the oldest ones and/or the ones with the longest notes. They are fine, which is a relief, but also adds to the mystery of the deleted note. I can only conclude that I must have deleted it myself, by accident, perhaps while editing it on my phone, and didn't notice it at the time. No matter the cause, I would like to get it back.
I don't have a recent backup, so that won't help. Speaking of which, not having a recent backup is something that needs fixing. I go to Google Takeout, and make a backup of contacts. While I'm here, I notice there isn't one for Gmail.
later...
And there is a selection for Gmail. Did I miss it? Was it gone? Anyway, Gmail backed up, and since then I've found I don't really miss that note so much after all. Too much work for too little yield, so I'll let it go.