wall intersection erro

[Anonymous]

Hi

I cheked Ref. line, material priority, layer intersection group and attach order
but at the of the insulation, they are work properly
can you give me a advise?
I attached the images plz check

[Laszlo Nagy]

Do your 3 Walls join in a single point?
It seems to me that the 2 Walls that are the continuation of each other are joining in a certain point and then the third Wall joins into just one of them, not both, at another point, which may cause this result.
So try to make their Reference Lines join in a single point.