So, I've been playing around with the 230 betas (I think am at 233 now) and I really think you should be made aware that diffusion t2i models really don't like to generate images that are smaller than their default set size. That's 512x512 for SD 1.5 models and 1024x1024 for SDXL and FLUX. That doesn't mean you can't diverge a fair bit, but 256x256 really is not a good image size and that seems to be what the in-chat image generation seems to want to default at.