it gets complicated when the same image has both healing and AI Masks. Here is a summary of the some of the sticking points that trip people up
The notes below all relate to using one of the AI masking tools (Sky, Subject, background, etc.) in conjunction with one of the Healing tools. When you do this, in some cases order matters and in some cases you will need to re-compute your AI Mask. These interactions are somewhat complex but can be summarized in these 4 rules:
Rule 1 – When an AI mask is computed (either initially or re-computed) it uses the pixels as shown on the screen at that time, including any healing done prior to the mask being computed, to determine the area selected for the mask.
Rule 2 – Once created, the area selected by an AI mask is not altered unless you re-compute the mask. Sometimes this happens automatically, sometimes not. For example you clone out a "Subject" after the Subject mask was created. The area selected by the subject mask is still selected (and adjusted) by the subject mask even though the subject was cloned out and is no longer there.
Rule 3 – If different content is placed into an area currently selected by an AI Mask, the Mask adjustments will be applied to those pixels as those places on the image are still selected by the mask.
Rule 4 – If Pixels are copied from an area selected by an AI mask to an area not selected by that mask, those pixels will lose the adjustments applied through the mask as they are no longer in an area selected by the mask.
Re-compute an AI Mask to have it use Heal Tool changes that were made after the AI Mask was last re-computed.