Problem with screenprotector

I have problem with screenprotector I have temperered glass 0,3 mm, up in the right corner it release. I have test with four pieces now after about four day it release, only in the right upper corner. So now I use plastic protections but I don't like the plastic protection.

Someone else that have this problem? My friend has an iPhone 6 and he has exactly the same problem in the right upper corner.

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