I think we understand the problem you have described. The issue you point out is more of a bug with Premiere, I would expect them to fix it soon or add additional support. Applications like Resolve and Flame do not have this issue.
Sapphire are high-end visual effects plugins. You are requesting a plugin to fix a color correction issue in one specific host. Issues like these are best left to Adobe. We tend to think a lot bigger!
On a side note, I might suggest upgrading from Premiere CS7??? 2013 was a long time ago, and I’m sure the new Lumetri Panel in Premiere CC does not have this problem. But once again, that would be a question for Adobe.