Do I write this off to "wood moves" or something else?

I built a mesquite table using kiln dried mesquite from a reputable source around a year ago. I am very pleased with how it turned out. I had it in the home for apx. a month when we suffered a fire that resulted in moving everything into storage (conditioned space) for apx. 10 months. When the table was brought back I was relieved to find no damage had occurred during shipment/storage. We are in the house for around 5 weeks when these cracks developed in one plank of the top. No other cracks have shown anywhere else.
I’m wondering if this is just a case of “wood moves” or possibly something else. Cracks do not go all the way through to the bottom and one edge is proud of the surface by apx. 1/32”.
The top is constructed out of 5/4 mesquite that has been epoxy filled for voids/cracks. The epoxy process, as you would imagine was quite lengthy and took 5-6 days to ensure all the cracks/voids were filled completely. I used dominoes for joining the planks together and finished with 5 coats of Arm-R-Seal hand rubbed to 1200 grit.
Maybe someone with a lot of experience in working with mesquite has seen this before or any suggestions are appreciated. It would appear the fix is pretty simple; plane to flat, fill crack with epoxy, and refinish.

Many Thanks,
Hog

-- Don't let perfection get in the way of plenty good enough