lovebird molting problems

[lorannex]

Hi everyone,

I rescued a lovebird six months ago and had a lot of feathers missing due to anxiety and stress issues. I took him to the vet and gave me a product called feather up and in 4 months it regain mostly all of his feathers. Today,however I noticed that under his beak there is a patch missing again and a small patch above his cere. He is not plucking, very lively and eating.
Anyone else has ever encountered similar problems?
Thanks

 

[Lacewing]

Can you show us this area in a photo? There is an area under a birds lower beak with no feathers. It's very smal