I just noticed that Cubase 10.5.20 sends MIDI to my synthesizer (Yamaha Montage, 3.5 firmware) when a project is opened. This includes SysEx messages, and cc7 messages.
It even happens with a new, empty project.
I have attached a zip file containing two MIDI files. I captured them using the Montage recorder. One of them is what happens when I open an empty project. The other one is what happens when I open the project I am currently working on.
Why does this happen? How can I get it to stop?