noticed that one with gamma 2019.2 015. nodes/operations are sometimes marked as red with no apparent reason, throwing error message “The patch has errors, open to see more”. When opening said patch, nothing special is going on (no errors), and just moving a pin (which trigs a new IL compilation) removes the error message.
also saw that one in forward regions that would turn red for no reason, and as in the gif above, moving a pin would make the error go away.
edit happened again when just moving process definitions
edit 2 pressed CTRL+L to align nodes in my definitions, this also made the error go away. Actually, the error seems to disappear soon as there’s a “New IL compilation in the making” (rightclic/recompile also works).