Is this really a fix at all? The trend seems to be that light clients want to fetch memos, and whether this is done automatically or manually doesn’t change the underlying privacy concerns; it just forwards the burden on to the person using the wallet who is in a worse place to understand what those concerns and risks actually are.
Now with a growing pool of light clients starting development (and deployment) seems to be a good time to work out exactly what the solution to this should be while still early enough in development - my biggest fear in this area being that this gets put off for long enough that we end up with a perpetual pool of light clients all with slightly different memo-driven behaviors, fracturing the anonymity enough to lose any potential benefit of a more robust mechanism.
This goes beyond the specific Nighthawk wallet, so I’ll suggest that any future discussion on this happens in the Practical Privacy Issues in Lite Clients thread.