Screen flashing and can't zoom photos with Google Fotocamera app

I’ve 2 problems with my FP2.
1- sometimes the screen “flashing” when i’m scrolling down in a chat like whatsapp
2- i can’t zoom photos when i’m seeing them in Google Fotocamera app


For the second problem, this seems to be a bug of the Google Fotos App (see here). The only solution right now seems to be using another picture viewer like QuickPic.
And for the first problem: What exactly do you mean by “flashing”? Like “flickering”? If so, you might have a look into this thread.

We had also a thread for another “flashing screen” problem.

Please continue in the threads linked above.