Bug report #21955: Duplicate layer when changing the order in the Layer order Panel - QGIS Application - QGIS Issue Tracking

Bug report #21955

Duplicate layer when changing the order in the Layer order Panel

Added by Etienne MORO over 5 years ago. Updated over 5 years ago.

Status:	Closed
Priority:	High
Assignee:	Nyall Dawson
Category:	Map Legend
Affected QGIS version:	3.4.7	Regression?:	Yes
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:
Crashes QGIS or corrupts data:	No	Copied to github as #:	29770

Description

Very annoying bug using QGIS daily:
When you change the order of a layer in the 'Layers Panel', the layer is duplicated in the 'Layer order Panel'. Then, if you activate 'Control rendering order', change the order of layers in the 'Layer order Panel', and add a label to the duplicated layer, the label is also duplicated in the canvas, as if there were the layer twice, whereas there's only one layer.
I made a video (attached to this message) to show this problem. You'll also find the files used in this video, but the problem is always the same with every kind of layer.

_pb layer order.zip - Layer used (65.3 KB) Etienne MORO, 2019-04-29 06:51 PM

Qgis-PbLayerOrder.mp4 - Video showing the problem (4.87 MB) Etienne MORO, 2019-04-29 06:54 PM