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I am encountering a weird behaviour in QGIS 3.20 on Windows.

Steps to reproduce:

  • Create an empty project
  • Create a SHP layer.
  • Add a few features.
  • Save the changes to disk

At this point everything is fine. Features still appears.

  • I create a spacial index for the layer
  • Add a new feature
  • Save changes to disk.
  • Zoom out/in
  • The latest features disapears.

This problem dosn't happen on my Linux machine, but happens on Windows. I found out that on save, on my Linux box, the .qix file is deleted, whereas on Windows it is not. When deleting the .qix file on Windows, the features reappears. This seems the be a common issue dating back a few years.

How can I make the features stay or make the deletion of the .qix happen?

I found this issue on the qgis tracker, I know this is a QGIS bug, and I'm looking for a workaround.

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  • I've noticed feature disappearance can occur when the index files are the ArcGIS sbn and sbx when working in a mixed QGIS and ArcGIS setting. QGIS can read those files but it can't write them. I'll run the Check Geometry tool and everything draws. Alternately I might use ArcCatalog to update the indexes after removing the layer (so QGIS doesn't lock it) and then adding the layer back in. Commented Oct 12, 2021 at 13:21

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