About the buttons I find a issue when trying to manage catalysts, be it on the collection or on the rift.
when you try to upgrade catalysts, it's like the cancel/upgrade buttons are there, but the places to hit it are smaller or in another place, i have to push the back button to get out or land where the "real" button is.
After some tries the sell/upgrade button just get grey when you click any of them and you can't enter the cancel/upgrade screen anymore, both on rift or in the collection.
When i restart the app the catalysts cancel/upgrade screen starts with the "hitbox" issue and after some time it moves to the "grey box" in the catalyst sell/upgrade screen. looks I have to "poke" some times to trigger the problem.
rolling on version 4.3.1 of the app
my device is a:
motorola moto G5 (XT 1683)
android 8.1.0
RAM: 2 GB
int.storage: 32GB