SG-X chainring compatibility issues
TA chainrings have their own system of ramps and pins, which in my experience works quite well.

It is possible that Shimano has found a way make chainrings that work only at the combination they are designed for. They certainly market parts as if it was so. In my experience, TA works fine even in non-standard combinations (28-38-50 on 4-bolt MTB crank in my case).