Transpose stops working after exactly 15 notes

[pdusen]

I have a newish MRCC updated to the current firmware. I'm using it to connect some MIDI organ pedals to an MPC One+ for sample triggering.

I have the pedal output connected to the MRCC'S input 1, and the MPC connected to Output 10. I am routing from input 1 to output 10, and the only modifier is Transpose #1.

I have observed that the first 15 notes I press on the pedal always transpose correctly, but the 16th note, and every note thereafter, always reverts to the original note output by the pedal. It doesn't seem to matter which notes I press; I can play the same note or multiple different notes, but Transpose always stops working after 15 notes. I haven't seen this behavior in the midi pedal itself when connected straight to the MPC; it outputs the same note consistently.

[RadekPilich]

Weird, I have tried with my MIDI keyboard and I'm not encountering the issue.
What range of notes are you using?
What's +/- transpose are you using?

[Jesse Johannesen]

This really is a weird one, I wonder what might be going on? Can you look in the MRCC in the tools there is a MIDI monitor, it should show any MIDI data being sent out, that should be enough to see if the note being sent stops being transposed, or if it's happening in the destination device. I am pretty sure it will only show MIDI data that is being routed so if we want to double check its actually sending the right notes, we can do something a little trickier and take the output of 10, route it back to another input, lets say 5, then route 5 to output 9, and look at the MIDI monitor. If we send note 60 for instance and transpose it to 72, it should say 72 out 10 and then 72 in 5 and 72 out 9 in the monitor each time we press the key.

[pdusen]

Weird, I have tried with my MIDI keyboard and I'm not encountering the issue.
What range of notes are you using?
What's +/- transpose are you using?

I've reproduced this problem just using a single note, but the whole range of notes I'm playing is 40-43 (according to the midi monitor)

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This really is a weird one, I wonder what might be going on? Can you look in the MRCC in the tools there is a MIDI monitor, it should show any MIDI data being sent out, that should be enough to see if the note being sent stops being transposed, or if it's happening in the destination device. I am pretty sure it will only show MIDI data that is being routed so if we want to double check its actually sending the right notes, we can do something a little trickier and take the output of 10, route it back to another input, lets say 5, then route 5 to output 9, and look at the MIDI monitor. If we send note 60 for instance and transpose it to 72, it should say 72 out 10 and then 72 in 5 and 72 out 9 in the monitor each time we press the key.

According to the midi monitor, the first 15 notes I play are 28-31, then from the 16th note onward they become 40-43.

I tried the other test you recommended, but the results don't make any sense... It shows the input and output notes being identical and not transposed, and then after 16 notes they both shift up by an Octave not transposed. I only have transpose 1 on the first routing from 1 to 10. 

This would suggest that the keyboard itself is dropping an Octave after 15 notes... Except that I know for a fact that it doesn't. Like I said in my first post, this issue doesn't occur if I plug the keyboard directly into the MPC, and the MPC's note monitor doesn't report any shift.

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One more note... Those test results would also suggest that transpose is doing nothing at all, which also don't believe to be true.