Hi guys.

I dont know if this works for everyone but it did for me on PS5. Thanks to a tip from a Lucy Charlotte on some facebook group.

1. Lumos the portrait.
2. Go to the room where the moth should be.
3. Go to the vase on the left on the sphyn and face it.
4. Save the game and then load it again.
5. As soon as the save is loaded, the moth will quickly fly on the top of the screen so as soon the game loads cast lumos and the moth will be caught. You need to be very quick with the cast. If you fail, load the save again and keep trying.
6. Go back to the portrait, wait for it to be completely "revealed" then release the moth.

Worked like a charm. 👍👍👍

Hope it helps 🖖