Yeah, we have also reached out to Arturia — however, our concern is that the problem is in the JUCE libraries (I believe Arturia uses JUCE)
We ran into a bunch of problems when we upgraded to 5.4, one of for which we found and reported the fix (see Gathering of parameter list broken in JUCE 5.4.1 Audio Plugin Host) and right now we’re trying to figure out whether this new problem is due to JUCE support for plugins or JUCE support for hosts.
We think it’s the former because this problem only happened when the Arturia plugins were updated and the same plugins fail in a different way when we test with an earlier version of the host that used JUCE 5.2