Android App - Program & Debugging

Please do not bid unless you can start now. Someone with knowledge of android applications is needed to assist with debugging and upgrades of an internal company application. The app is written in Java and allows users to create purchase orders and cycle count inventory in a retail store environment. It is very basic in its current form, but will continue to grow as we add more features. We have a primary freelancer who has built most of the app. This role will assist when the primary is not available or when there is overflow work for both to do. I'd like to have someone start working on a small bug right away. When using the app, everything starts off fine, but then a part of the screen goes black. The user gets through some activity before it occurs. All I need is for the screen to stay white. Your task is to find the bug and remove. I have a computer with android studio ready to go along with a virtual emulator and teamviewer so you can remote in. If all goes well, I can create a firewall rule so you can work on the app without using teamviewer. I uploaded an image of where the app goes black.