I have this weird error where frame image does not loads for me. When I tested in wc frame developer tools, I can see the request failing with below error. Oddly this did not happens when I tested with another account (fid) (Or even in my local setup which does exactly same).
Any insights appreciated!

That's due to having a lot of UI components in the screen, not due to final image size. The browser is probably cutting part of the final image url, and that's why it's unable to render it.

In cases where you have more complex screens composed of a lot of elements, you need to use the image handler - https://frog.fm/concepts/image-handler

That will surely fix your probem!

Yes this fixed my issue. Though had to pass some values as url params since state was not available in image handler apis. 
400 $DEGEN