In safari mobile ios, if an <input type=file...> is set to open the camera, the camera is always opened even if the camera permissions are set to 'Deny Access' or 'Ask Access'.
<rdar://problem/78461445>
Camera permissions are only used for navigator.mediaDevices.getUserMedia, in particular to controll its Deny/Grant prompt. <input type=file...> requires a user gesture to select a given photo so does not require a specific permission.
This is working as designed. Resolving using the mildly offensive 'Invalid' category to indicate this is not an implementation bug.