I’m using Premiere Beta. Whenever I try to create a second mask anywhere, black lines appear on the image, and my mask shifts/moves to a different position.
Welcome to the Premiere Pro forums! We are glad to see you here. Thanks for including both your screenshots of what you’re experiencing. We need a few more details to try to help with the issue. Please see, How do I write a bug report?
I noticed in your screenshots that you’re also using the new Color Mode with the masks. I wonder if you’re having this masking issue whenever you’re adding a second mask at all (outside of Color Mode) or is it isolated to when you’re in Color Mode?
Sorry for the frustration and hope we can help soon!
This also happens when I try to apply a mask to any other effect, such as Focus Blur or Lumetri. It seems like whenever I add a second mask, this frame/border appears around the image