@hape I am looking at the issue and I just noticed that the preset has controls with the same ids on different pages. In that specific example you sent, the sysex control with parameter number 3 is located on the second page.
The trouble is that in such situation - when parameter number is the same but other message bytes differ - E1 sends out the first message linked to that parameter. I will still research it more, I just wanted to share what I found so far.
I will also think about how to display the parameters on some overview that would allow to detect this easily. For now, pressing a space bar will show such information for current page.