Minecraft ceeps singning me out

I have that too

When you close the app it signs you out. Just tell it to remember you and you just have to tap login OK. P.s. it's keep

We are working on a new login (behind the scenes) system that will hopefully fix this.

It is the same issue, this one has at better name but they will be merged. We know what it is and it should be fixed in 0.7.3. 🙂