I glued up this oval Santos mahogany coffee table on Sunday.

Yesterday morning, Tuesday, I placed it outside under cloudy skies in the hope that the UV to hasten the darkening of wood surface before finishing later this week.

The center seam opened up. I used brand new T-88 epoxy with biscuits when gluing up this top.

I jointed the mating edges and wiped them down with acetone before applying the epoxy.

I've had this wood in my shop for many years, so it's beyond dry.
Any ideas why this happened?
Is the only solution to rip it apart and re-do?

IMG_7859.jpg IMG_7872.jpg

The seam opened from end to end, but not on the underneath.

Gimme your wisdom! Mark