Reproducible in the following environments¶

• QGIS 3.0.1 on openSUSE Leap 15 + QuickOSM 1.6.1
• QGIS 3.0.3 on Linux Mint 18.3 + QuickOSM 1.6.1

Steps to reproduce¶

• Start QGIS 3
• Menu: Project > New
• Menu: Web > QuickMapServices > OSM > OSM Standart [optional step for OSM background tiles]
• Menu: Vector > Quick OSM > QickOSM
• Set query parameters to: {key: leisure, value: park, in: Leipzig}
• Run query ...
• Result so far: 3 new layers (with 599, 98 and 128 objects)
• Menu: Project > Save as ... "test.qgs"
• Menu: Project > Quit QGIS
• At this point, QGIS will ask: "Save current project?" I chose "Save".
• Start QGIS again
• Open "test.qgs" - all three new layers exist, but they contain ZERO objects

Workaround?¶

After saving the project and before closing QGIS, save every new layer as a geo package. This way, I at least do not loose the polygons although the layers created by QuickOSM will be empty after re-starting QGIS.

Question¶

Is is a bug in QuickOSM or QGIS or both? Or is this some sort of new intended behavior in QGIS 3?

For reference, I also filed an issue against QuickOSM: https://github.com/3liz/QuickOSM/issues/115