Thanks.
No, thank you!! I really appreciate your efforts to try and fix this issue

I updated s95 firmware with your test build, new version number was on splash screen. Something has definitely changed - the UI wasn't appearing at all previously, and now displays. However, the halved viewport remains

I cycled through all the options, and oddly enough FISHEYE shows the entire scene correctly, albeit skewed by the fisheye effect.
Happy to try any troubleshooting directions or advice you might have, let me know how I can help!
Cheers