Here's how to clear one's browser cache cookie browser data on mobile phone devices used as a controller. This may help solve any issues with artwork or input connectivity. This varies by device and browser, but if something isn't listed below, there are likely to be equivalent locations.
NOTE: It's highly recommended that one closes the app with device multi-task (double tapping the "Home" button or its equivalent), before attempting again after the steps below are followed. A simple refresh may help but doing this will ensure a fresh state is achieved.
1.) Go to the Settings app on the device's home screen / main menu.
2.) In the Settings app / menu scroll down and select "Safari"(note that this also applies to other browsers if installed!)
3.) On this page select "Clear History and Website Data"
2.) In the drop-down that appears choose "History".
3.) On the next screen choose "Clear Browsing Data".
4.) On the next screen ensure that all possible boxes are check marked and then choose "Clear Data".
1.) In the browser app select the Settings by choosing the "three dots" in the upper right of the screen.
2.) In the drop-down that appears choose "Settings" and not "History" (as this will more fully clear than that option!).
3.) On the next screen "Clear private data".
4.) On the next screen ensure all possible boxes are check marked and select "CLEAR DATA" to finish!
If none of these steps work please open a ticket via the form or email firstname.lastname@example.org for more information!