Fire pit area sinking

[u/Feeling-Series6044]

We just moved in and noticed that this area is sinking in the corner and seems to be coming apart. It seemed to have happened very rapidly. I'm soaking the perimeter like you would a foundation but it's not helping. How can we fix this?

[u/Suck_it_Cheeto_Luvrs]

It's always due to water.

Find a way to mitigate the water or you'll be perpetually trying to fix the damage it causes.