Text+ in Fusion Page Slow and glitchy

I've pasted some fairly basic 2D Text+ animations from Fusion 9 into Fusion Resolve and it's really unusable. It's slow to update, alphas don't combine consistently, weird renders where it seems to feedback on itself, etc., etc. Then the cache on the Edit page is different to the similar render errors in the Fusion page. In Fusion 9 its quick to render and has no problem. Nothing really fancy going on.

Anyone else finding this? (I can upload a log if it helps).


R15.0, Win 10 Pro, 32GB RAM, i7 6850K, GTX 1080.