I’m noticing an issue with object outlines that is easy to reproduce. In the attached scene I have two objects with puzzles to activate/deactivate their outline when clicked.
When one object is partially hidden by another and its outline is enabled for the first time, there will be a brief flash of the hidden outline. The hidden outline in my scene is set to black and therefore should not be visible at all. Each subsequent activation of the outline will display properly. It only happens on the first outline activation. Tested this on Windows in Chrome, Edge and Firefox. I’m seeing it on all three browsers.