Hi,

It seems that comparators have a directional issue that causes subtraction mode to behave differently when used facing in the X direction versus the Z direction. Facing in either X direction they behave as expected. However, facing in either Z directions, the comparators fail to subtract signal pulse correctly

In the included attachments you can see 4 simple XOR gates I built facing in each cardinal direction. When building towards X direction, the logical XOR gate works perfectly. When using the ones built in the Z direction, they fail to subtract correctly, producing an incorrect truth table for the gate.

Because of the 10MB size limit I uploaded a video in two parts, each showing 2 cardinal directions