Dont know if this is old, but is the first time i notice.
With her “mastery” skin (in all colors), you know, the one that cover all her body as is like scales clothes.
After doing Cleansing Flame, Alex dissapear.
Tested with all the other skins, and this does not happen.
Here is a link to the video of how it looks. dont know if I become invisible as well for the enemy or just myself