Problem with air spot after glass replacement in Samsung S8

Hello, I made few only glass replacement at Samsung s8 with Loca glue - TP 2500.

After, few days or in one case - two months, i noticed some “air spots

” under the glass.

It looks like the glue is “working” and it change position. It makes some space and air is going under the glass.

Do You know what is the source od the problem?

Maybe i should use Tp-1000, but when i used it one time it works fine (without air bubble/spot) but it destroyed a touch in samsung s8.

I attach a photo with this problem with loca glue at samsungs s8 that i have.