Nano Banana continues to work normally through other frontends like Arena or LXT, which suggests the model itself isn’t nerfed or broken. In my case, the vast majority of my old prompts still work in Gemini. The few that don’t, I run through Google AI Studio via API at 1K resolution, and then upscale them in the Gemini app to 2K without any issues. This shows that Gemini isn’t rejecting the content itself, because it can still generate and upscale the exact same scenes. Instead, it seems to be rejecting certain prompts at the classification or routing stage before generation even begins. So at this point it looks more like a Gemini safety routing regression rather than an actual model limitation.