When you encounter some system bug, you should reproduce bug to find what step causes bug.
You don't need to reproduce condition or step perfectly, but describe your action or event as detail as possible.
If you success to reproduce bug, it's time to get BugReport file that contains bug log.
Emkit is pre-installed solution on all Point Mobile's android device. You can find EmKit on home screen usually.
Tap Save Button in dialog to save BugReport file.
Saving BugReport file takes about 2 minutes and you can see a notification when save process is complete.
Using file explorer, find BugReport file. It will be saved to BugReport folder of storage as zip file format.
Upload file at HERE.
Don't forget you should also upload device information file.
Please refer to article below that is about 'How to get DevInfo file'.