Select Less did not work if whole plane is selected

I’m trying to deselect border faces in the plane with “Select Less” and nothing happen.
How to do thing like this? or it’s a bug?

Only how I can it’s:

  1. Select all.
  2. Select - Select Loops - Select Boundary Loop
  3. Select More
  4. Switch to Faces
  5. Invert Selection

Five steps instead of one action Select Less…why so complicate?

Select more / select less needs a border of selected/unselected to work. If all/none is selected the function did not know from where it should select more/less. It is not a bug.

It would be nice if all is selected the function would take the boundary as “unselected”. But it will still not work with closed meshes.
You can make an improve request here:

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