I had difficulty reporting gas prices again while at my usual gas station. Usually as soon as I arrive, while Waze is on, I can report gas prices. App is up to date. Today I got an error stating the prices being reported were invalid. Tried more than once. Sometimes it works and sometimes it doesn't, so my suggestion is make it possible for users to report gas prices at stations they were close to, or the stations within a bigger area. That way you can re-attempt later.