Problem with jigsaw block in vers 1.20.4

I created a desert pyramid datapack since vers.1.19.4 and it worked well. Now I`ll update
to vers 1.20.4 but there would appear one layer of sand, where it should not be and I dont
know why...
There are two parts of the pyramids, one top and one bottom connected wirth jigsaws and this would work normally...
I tried changing the loading order but it didn't help,
On the right side you see as it is at the moment and left as it should be....