Fusion has absurd VRAM usage

Hey all, I've been dealing with a problem for the last few months. I don't remember if it started with Resolve version 19 or 20 but every time they release a new version I hope they fix these performance issues I've been having.

My system has 64GB of memory, paired with an RTX 3090. I work in 4K for the most part, and the performance is solid in all areas of the application except for the fusion page. Whenever I open fusion, either the tab within Resolve or the standalone application, my VRAM usage starts skyrocketing until it quickly fills up all 24GB and starts dipping into shared memory. And this isn't with large, complicated compositions either. Even simple shots with just a dozen or so nodes will eventually grind my system to a crawl. It used to be so bad that my entire system would chug until I force-quit Resolve. Eventually I figured out how to limit Fusion's VRAM usage (I set it to 18GB max) and that at the very least stopped it from slowing down Windows itself. But nonetheless, when the VRAM limit is hit, Fusion becomes unusably slow.

Why is the VRAM usage so high? It almost seems like a memory leak somewhere, as the initial load of a composition doesn't take up much VRAM, but working on it for a few minutes causes the usage to steadily rise until it becomes a problem. Is 24GB really not enough to run simple 4K compositions? If I was working in 8K, or running hundreds of nodes, I would understand. But I really don't think I'm asking for too much here.

For the record I'm on Windows 11, Resolve 20.3, and I have the latest Nvidia Studio drivers at the time of writing.