Normalmap difference between Painter and Blender

Hi all 🙂
Just want to know what i have to do, to get the same normal appearance in blender like in Painter, where i created the normal map.

The mesh is triangulated, i am using OpenGL in painter but everytime i load this normal map in blender it looks like this.

But i wish it would look like this

This pic is from inside Painter. Here i don't have artifacts.

The interesting part is, everytime i bake something in blender it looks good here but as soon as i import this blender generated normal

inside Painter i get the same issue vice versa.

Hope you guys can help me out here.

Thank you so mutch in advance

Chris