Null island point in 'HOT Tasking Manager Geometries'

[SColchester]

Describe the bug

When downloading the 'HOT Tasking Manager Geometries' geojson from a completed project on the data page of the MapSwipe website, in about one in ten instances the geojson has a stray point at null island.

This point needs to be manually deleted in QGIS or JOSM before the Tasking Manager Geometries can be uploaded into the Tasking Manager to create a Tasking Manager project. The Tasking Manager does not allow projects to be created with point features so the upload fails.

To Reproduce

This is just one example, I have dealt with dozens of project outputs over the last couple of years with the same issue:

1. Go to: This OSM Zimbabwe project's data page
2. Scroll down to the 'Download the data' section
3. Click on 'Download' next to 'HOT Tasking Manager Geometries'
4. Pull the downloaded geojson into JOSM or QGIS, if you are zoomed to the extent of the layer you'll notice that the HOT Tasking Manager Geometries are miniscule and in one corner of your view (because the null point is in the other corner)