There is an issue with the patch described in
I don’t know exactly how, but the patch results in sending a START-STOP sequence, when zynthian is midi controlled externally with system messages.
It leads to the above mentioned result (New testing image Bookworm Oram 64bits - #549 by gitnob).
I deleted these lines and compiled and installed zynseq.cpp with make and make install. Restarted zynthian.
After this the regular behaviour was reverted.
This is a bug, isn’t it. Perhaps it was mentioned to allow starting patterns after external midi system messages??
Regards