Unit change from CM to IN changes object scale?

Changing from the default CM to IN apparently scales up any content already in place…

For example, if I’m in the default level with just the chairs and table and stuff and change to inches (or feet) and then import a 2’ x 2’ x 2’ cube, it imports, and I believe its scale is correct, because when in the mesh editor, the Approx Size is 24x24x24.

However, the chairs already in the scene appear huge - the seats appear to be about 4’ high.

Assuming the chairs are correctly sized before the unit change… Is there a way to fix this?