Scaling layers

[FAMOsa]

Hello.  Thank you all in advance.

I make a lot of composite pictures with many layers.  I import an image as a layer and then I click on it and on the scale tool and I get a little grid over the layer and I can adjust the size as I like.  I have done this many time, but in one document the scale tool is acting fishy.  I get the grid, but it is not the same as the layer.  It is some crazy configuration like width=3000 pixels.  height=1 pixel. 
I've tried to reset that tool, both in the gimp preferences and in the reset button in the scale dialog box.  I can never make it go back to the original way of just giving me a grid over the selected layer. 

I would appreciate any help.

[PixLab]

I never heard about that, can you post the .xcf file (here) for us to try (and understand what's happening)?

[rich2005]

Could be many things. Check that you are not trying to scale a selection of some sort Use Select -> None and Scale tool in Layer Mode (left side icon)

Other than that: post a screenshot somewhere showing the problem + the layers + the scale tool settings
eg: https://i.imgur.com/04LelEM.jpg

[FAMOsa]

This is a screenshot.  I can't attach the xcf file because it is too big.    

[rich2005]

I still think you are scaling a one-pixel high selection. Have you up-graded to Big Sur where the selection is there but does not show ? Which version of Gimp ? It looks like Gimp 2.10.14 or there-a-bouts. Not paying attention Gimp 2.8 given.

Did you try Select -> None. Then apply the scale tool.

Your screenshot is a bit fuzzy but this is a what I think is close. This in linux / Gimp 2.10.14 https://i.imgur.com/i7TywBG.mp4 I hope you can play one of these in MacOS.

[FAMOsa]

Hey, great.  That worked.  Thank you for making that little video.