To reproduce the issue, run following command on MacOS.
gradle --continue --info -PFULL_TEST=true -PUSE_ROBOT=true :systemTests:cleanTest :systemTests:test --tests test.robot.helloworld.CustomSecurityManagerTest

Failure observed in following tests:
-testFullScreenAfterPermissiveSecurityManager
-testFullScreenInitPermissiveSecurityManager
-testFullScreenInitNoSecurityManager
-testFullScreenAfterNoSecurityManager
with failure message: junit.framework.AssertionFailedError: expected:rgba(0,255,0,255) but was:rgba(68,68,68,255)

I was able to reproduce this issue always (in M1 Ventura 13.3) while it is observed intermittently on some systems