Features disappearing when zooming and panning

[qgib]

Author Name: Ed B (@boesiii)
Original Redmine Issue: 18609
Affected QGIS version: 2.18.17
Redmine category:map_canvas

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Hello,
When I use a certain shapefile in Qgis 2.18.18 some of the features disappear and reappear when zooming or panning. The strange thing is they do appear in the attribute table even though they do not appear on the map. The features in the images are manholes and pipes and all the manholes (points) should have connecting pipes.

I can't share this file here but if you email me I will share it with a developer.

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• Capture2.PNG (Ed B)
• Capture.PNG (Ed B)

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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This is usually caused by a corrupt spatial index. Delete the SBX and SBN files from your shapefile and reload the data.

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• resolution was changed from to not reproducable
• status_id was changed from Open to Closed

[qgib]

Author Name: Ed B (@boesiii)

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It was actually a QIX file that was causing my issue. Would there be someway to detect this file and ignore it if things didn't match?