I swapped C41s but that did not help so I played with repeats. I found, contrary to expectations, that fewer repeats worked better. In fact, with five repeats I could not get the C41 to respond at all. With zero repeats it actually sometimes worked and if it didn't, the help button would quickly correct the problem.

I also played around with the IR transmitter and that seemed to help a bit.

There is still a problem between the 880 and the C41 over an IR repeater. It is too bad the help button doesn't correct the settings or at least indicate what it did to help. Right now I seem to be pretty close but don't know what to do to completely solve the problem.