ATI Radeon 4800
I dont know if it could be an issue.
I think HTML5 runs in canvas or webgl so they could work and natively it could still not work in windows( I am having this issue right now in windows where resizing works in html but not in DX for example)
@Skaruts Regarding your error:
Did the application start by being a small window like this :
And you tried expanding it and then it crashed ?
If so maybe you could look at if you have the latest up to date drivers for your graphics card. I had an issue with an application using Kha that when falling back to DX11 would crash.