Character rapidly blinks in and out of existence after changing appearance with "Enable NPC faces on PC"

[kayennepepper]

When changing appearance with Anamnesis on player characters with "Enable NPC faces on PC" turned on, such as hairstyle or gear, the character will rapidly disappear and reappear in the game, and Anamnesis will show them cycling between Player and Battle NPC.

To Reproduce
Steps to reproduce the behaviour:

1. Go to Settings
2. Turn on "Enable NPC faces on PC"
3. Go to a pinned player character
4. Go to Character - Change Appearance
5. Select another hairstyle or piece of gear
6. Observe error in game and in Anamnesis.

Repeatability
Bug occured 9/10 attempts

Expected behaviour
The character should not blink, and should remain marked as Player instead of Battle NPC.

[StoiaCode]

Known issue, fixed In #1402