STARTECHSTUDIOS
> I do this (check this box), but then I get a hideous black bar on the bottom as well. Not sure why...it's really an eye-sore, and interferes with gameplay...
Yours is a device-specific problem with the webview. I believe you use Samsung J5 or any devices that use an outdated webview or have compatibility issues.
Unfortunately, there are less things that you can do about it. Back in Construct 2 since the majority of devices were the old ones now, we made lots of workaround, with CSS through either IntelXDK or Construct 2.
But nowadays, all you can do is blacklist the old devices and focus on modern devices.
It's not a J5, it's in the Galaxy Note series and it's running Android 6.0.1, which represents about 50% of android users last I checked. I keep the phone specifically for testing, so I can build quality apps for all users, not just a minority of users...