Ok, I also checked Sylenth1, in this case you’re right, the information is not getting stored. But this is the first time I’ve seen this. If you check this for example with SIDizer it works flawlessly. It seems that it depends on the plugin if it works or not. But don’t ask me why, I don’t have a clue.
Edit:
Checked Serum, too. It doesn’t work, the information is lost after reloading the plugin. So yeah, obviously there’s a problem. Luckily I haven’t had issues like XTD until this day.