Raster data not displayed in Contents

[Lorenz]

Hey all, 

after processing my analysis and refreshing the map, my raster data in 'Contents' disappeared. 

It's like some invisible hand deleted the complete layer. 

I already looked into some tools (e.g., Slope / Calculate Statistics) --> nothing there. 

Is this maybe a bug? 

FYI: My last steps were extracting an area above a certain degree of slope & transforming the raster to a polygon. 

Thanks for your help 🙂

[Lorenz]

Short update: 

I reproduced the error. To give a concrete example: I extracted the pink polygon (which I titled 'Neigung >= 19°') from the raster data. The polygon stayed, the rasta data were deleted.

So, my initial problem was that the yellow coloring did not go away -- I basically tried activating / deactivating every layer possible, nothing changed. Where did the yellow come from? 

My next step was to Save the project and Open it again --> Now, after deactivating and activating the Layer Group, the Yellow coloring disappeared. But, as you can observe from the Video, so did the Raster data (even right after re-opening the project file). 

*send help*