Some insert plugins are not responsive. Basically, I have Altiverb 7 playing in Cubase 13 and 15, the insert is not showing up as Blue, but what’s even weirder is that I can’t seem to interact with it. However, when I create a new project I can create an insert with Altiverb and interact with it.
So on my existing project some plugins when placed as an insert start out blue but quickly grey out and I can’t interact with them, but those same plugins are functioning properly in a brand new sequence. However, I have done so much work on this one project I really don’t want to start from scratch.