Wall Display XL shows blank Home Assistant screen

I managed to setup HASSIO on the device and it was working fine, but now it displays a blank screen.

- The HASSIO server is discovered fine, the URL is correct.
- I can access HASSIO from my phone on the same URL
- Shelly has internet access
- Firmware is up-to-date
- Refreshing HASSIO page does nothing
- Reboot didn't help

I can't see a way to display any debug information on the device. What can I try next?

Seems like double tapping the HA icon restarts the webview? It worked!

Weird that the refresh button on HA page did nothing.

Thank you!