Thank you so much for your lovely words!!
Ah, I am sorry about that. Here are some ways, that might help:
- Put her in the middle of the big room, stab her there
- FPS Lock from 30 to 60 or higher
- If she still vanishes, go to the PC and highlight items, maybe she is just really far away
I hope this helps, again, sorry for the worsened experience, but thank you again for your positive outlook regardless <3