I have found that most cracks like that are related to slight movements in the framing that are not being helped by the way the rock happened to be hung... the location of butt joints.

It needs to be rescrewed, notched, retaped, and refinished. But even then, after repairing and patching it, it might come back.

IMO the best thing to do would be to cut out a large section at least 32" wide. Maybe even 48. Put in one piece of sheet rock that will span across where the crack is now... relocating the butt joints away from that framing member. It makes a bigger job out of it, but it's in hopes that it won't come back.

In opening up the wall you might also find the reason why it's cracking. Multiple studs that are not fastened to one another for example. Movement in the framing is what causes most cracks and pops.

Is that a 10' tall wall? I wonder if the jog to the left is at 8'?

 

The vault's peak is 14.5' tall.
The ceiling descends the same on both sides at the same slope.
The crack is on the left side, and is about 5 feet to the left of center
The height of the ceiling at the crack point is 12'.

 

That crack could be caused by a warped stud.

 

All good points/advice above^^^^^^^^^^^^^^^^^^^ BUT:

If paint handled it fine for a few years, and it appears to be a hairline crack maybe seasonally induced, GOOF-OFF makes a spray product called Goodby Cracks.

It's a spray on elastomeric type thin film that can be painted over and it will work for minor issues that it appears you have. It maintains your original texture

At $5, it might be a worthwhile try before ripping out tape or entire drywall solutions.

I think I found it on the internet.... don't think it is in stores.

Good luck

 

Thanks for the responses!

I am not sure how long the repainting hid the crack, but I think I will try the Goodby Crack stuff, as it does appear to get decent ratings by people.
At the very worst, if it doesn't work, I can always move to the next suggestions of tape and drywall solutions.