Whose butcherblock is it? Have you contacted the manufacturer or asked your contractor to? That is not caused by the liquid nails possible unless there was a solid top to your cabinets and he did a full spread with the liquid nails and even then I doubt it was the cause.

I will contact the manufacturer. It doesn't have a solid top on the cabinet its a pony wall with cabinet in fornt and spot of a dishwasher that hasn't arrived yet

Opps and a spot for the dishwasher

Thank you for the information. Does this mean I won't be able to save this countertop?

This looks like what happens to wood floors when the humidity in the house is very low. The wood shrinks some. Not sure if that is the problem.

It was white oak butcher block that I had to seal several times before my contractor installed it.

Who was the manufacturer? Is it solid white oak of a laminated oak veneer?

And yes the cap ends were added because the butcher block only came in 8 or 10 foot by 2 foot and had to be cut to 6ft and then two were connected to make the full top. However, the length was cut wrong and the end pieces were added to extend to the proper length for the structure.

But where did it come from? Was it ordered from a countertop place or Home Depot or John Boos or did your contractor fabricate it in his shop or?

The original blocks came from a lumber company here in town and were cut and modified by my cabinet builder.

Again, who is the manufacturer? Are they solid oak or laminated veneer? Without more info it will be impossible tell you if they can be saved or not.

They are solid oak. I am looking for the name of the manufacturer

OK, solid oak is good. What is the humidity in your home? Do you have a HVAC system that is running? As mentioned above this typically happens to flooring when the home is too dry. But the first pic appears to be an end cap that is coming off which leads me to believe that there may be more to this.

Doesn't appear that the top is 'cracking'. It appears that all the seams are opening. That's a big difference.

Get in touch with the fabricator/s. It's possible that the seams can be glued and clamped again. However, you may have to figure out a way to keep the heat and humidity from the DW from affecting the top in the future.

Yes I have hvac. The cracks are not just at the end cap they started in the center of the island. The one that is most noticeable is at the wnd because it push out

Are you noticing any crowning or cupping?

No crowning or cupping,

DW is not installed yet.. it was put on back order, so no humidity from that yet. But I will keep an eye on it

The only fix for that is rip and reglue. Biscuits and Titebond 2.

Wood movement 101: Wood moves in thickness and width* but negligibly in length. The breadboad ends and the liquid nails are preventing it from contracting so something's gotta give.

You cannot stop wood movement but you have to accommodate it.

*technically, radial and tangential movement.

https://www.familyhandyman.com/project/wood-movement-101/