The Sample Color node crashes SD whenever I switch the input image index.
Steps:
My Graph looks like this...
Bitmap -------------> Blend --> FX Map
Bitmap --> Levels___/
I set Global Opacity to "empty function".
My function graph looks like this...
Get Float 2 ( $pos ) --> Sample Color --> Swizzle Float 1
I set "Swizzle Float 1" to "Set as Output Node".
I select the "Sample Color" node and change the index.
I can send you the scene if you like.