Looks like this is a duplicate topic, so I’ll merge it into the existing one. Unfortunately the existing bug report is still unresolved. https://forum.inaturalist.org/t/android-app-double-posting/2861
If it happens again, you can send a log file to the app developers which can help them with troubleshooting the issue. To send a log file, go to the Settings tab in the app and tap three times on the version number. You will then have the option to email the log file to help@inaturalist.org.
Some other info that can generally be helpful when submitting reports about issues with uploading:
- What version of the iNat mobile app?
- What kind of device and what operating system version are you using?
- Do you have auto-upload turned on?
- Does this happen for every observation you upload?
- Does it only happen when you have a poor internet connect?