About the feat propagation function

[Davidcoach]

Hello, I found that the return value of forward bidirect flow function is (forward, backward), but the input of feat propagation function is (backward, forward). It seems like you put the forward flow as backward flow into the propagation function. Is that your design or a mistake? Looking forward to your reply. :)

[NK-CS-ZZL]

This is a legacy from MMEditing. The code is actually correct, but indeed hard to read. XD