Eliminate selected polygons wrong results

[gioman]

On 3.16 results are ok.

On 3.10 are wrong if output is saved to a shapefile or gpkg giving different wrong results depending on if the output was saved as shp, as gpkg (save as file) or gpkg (save as gpkg). Results seems correct if output is a temp layer.

Attache sample project and wrong results. Input layer is "acid" and selected features are 66, 75, 257, 271.

eliminate_bug.zip

Tested on Windows 10 and Ubuntu 20.04.

[github-actions]

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