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When reporting map errors during navigation the app needs to capture location and at least the immediate directions you were following. Since this is most often (realistically) done by the driver, and most often when driving, when a bad direction or map error is encountered and the driver deviates from the previous directions and presses the "report map error" button (which ideally would be a single button press on the map), the app should be able to recognize where the driver deviated, how they deviated, and automatically fill in the error details based on what was originally asked and what was actually done (for example, if Waze originally asked for a U-Turn, but instead the driver turns left onto a street and then eventually turns around, it's most likely the U-Turn was prohibited).
Instead of simply reporting a generic "map error" with no details, and then leaving the volunteer to try to ask for details from a driver who may no longer accurately remember the circumstances- often days after the fact.