Not sure how TestProject site is in Android devices, but in iOS i experience some issues related to the site’s responsiveness.
For example, i cannot scroll to the whole page in some cases or i have issues seeing what i typed eg in some test cases as the edit container goes out of my screen and it is not fully visible.
To fix those issues with a workaround, i usually rotate my phone 1-2 times and try to scroll again. I have tried both Chrome and Safari apps.
So if this could be fixed it could help a lot. Not using the mobile version to write scripts of course, it is just for quick small changes in the scripts mainly and checking the failed reports.