I reported this issue almost a year ago:
which resulted in many confirmations but no solutions or workarounds.
I just today received a reply to a PM I sent someone at Steinberg months ago on this issue. Of course the initial response from Jules was "must be something odd about the way the host's handling it" and the initial response from Steinberg was "looks like a JUCE issue" but I'll provide them with an example of the problem and hopefully we can get both parties working together to find a solution.
As I said in my PM to Steinberg:
Too often these issues trap developers like myself between two companies each saying "It's not us, it's them" when what is needed is for both companies to work together to find a solution, regardless of whose "fault" it is.
Here's hoping we can get this one resolved. And maybe VST3 bypass as well while we're at it: