This has been an issue since old days and so far I couldn’t find the root of this visual bug that makes a character’s (doesn’t matter if male or female) lips practically vanish.
In my example below I took a screenshot right after I sat down on the surgeon’s seat and another one after I switched my face and then went back to my original one. Without changing anything. No idea how to fix this. Any suggestions?^^
Please note that this does not only occur while on that chair or being in that instance. It is a persisting visual bug!