Resolve 15.1 ACES 1.1 Black Issue

Hi All,
When trying to use ACES 1.1 in Resolve 15.1, i'm coming across some issues.
Whenever I am selecting mostly HDR based Input or Output transforms (i.e. Rec.2020 1000nit+), the screen is going to black.
Strangely, these appear to be working when using ACES 1.03, but goes to black whenever I switch to ACES 1.1
When trying to use ACES 1.1 in Resolve 15.1, i'm coming across some issues.
Whenever I am selecting mostly HDR based Input or Output transforms (i.e. Rec.2020 1000nit+), the screen is going to black.
Strangely, these appear to be working when using ACES 1.03, but goes to black whenever I switch to ACES 1.1