I have a large QGIS project organized with several groups in the QGIS layer panel. It happend to me a couple of times that, when the computer is operating with low resources (low free memory-high CPU usage), the exact control of the mouse is lost for some seconds and I by mistake dragged and dropped a layer into another group.
Then to find where it went manually could take a long time.
Is there a way to look for layers by name in the Layers Panel?
Type to locate (Ctrl+k)just writel layername(letter l followed by the layer name). You just need to write the very first letters and you will see the available layers and you can jump to the layer. Really cool feature. – jgrocha Apr 20 '20 at 22:10