Wow, you're halfway there. Yes, when user data gets loaded into an executable code page - which are reserved for command data - it is a bug.
That is why LLMs - which intentionally mix user data and command data into the same space - ARE BROKEN BY DESIGN. Do you get it now? It is a bug, and it is a bug which is fundamental to the design of LLMs. There is no way to build one that does not do this.
Are you somehow under the impression that storage devices and LLMs fill the same purpose? That's a major misunderstanding. Here's a good starting point if you're struggling with the difference between a computation device and a storage device: https://en.wikipedia.org/wiki/Computer
That is why LLMs - which intentionally mix user data and command data into the same space - ARE BROKEN BY DESIGN. Do you get it now? It is a bug, and it is a bug which is fundamental to the design of LLMs. There is no way to build one that does not do this.