Maybe try removing the StaffCTRL messages shown in your image.
If it is not a recent synth it may not know that CC 88 has a defined use now and the synth may be reacting to it in unknown ways. (?)

It used to be an open (undefined) CC so some manufacturers used it for proprietary features, a long shot, but worth checking.

Last edited by rharv; 07/18/21 04:06 AM.

Make your sound your own!
.. I do not work here, but the benefits are still awesome