PowerBI iFrame Sign In Window Issue

[JuliusRymk]

Hello all,

Recently I found an issue when trying to sign in to PowerBI iFrame reports. I am using secured embed. After I enter my credentials and click Sign in, the borwser tab does not close and does not bring back to iframe tab. I am seeing the blank white page. This happened on an iPhone Safari browser. Do you have any ideas why this happened?

[v-chuncz-msft]

@JuliusRymk 

You may check Supported browsers and try privacy and security settings.