GP not updating speaker widget on Polychrome DSP Graphene

[npudar]

@MajorMotoko

But when using the VST2 version. The speaker in use does update. I also have another DSP, Lumos of theirs for comparison, in the VST3 version, the speaker in use is updating in GP and appears to be working correctly.

This suggests that the issue is in the plugin.
It is not rare that plugins behave differently, depending on the format.

See here: [blog] Which plugin format is better: VST vs VST3 vs AU