when opening the morph menu using the bracket keys or opening the radial menu with shaders active the screen changes color completely. Is there a way around this? I am using version 1.12.2

As Morph has just been rewritten and released for MC 1.16.5, I am clearing the issue tracker as I have not provided any support Morph for 1.12.2 and earlier. My apologies for not addressing your issue.