Blender bug with metric units When I set Blender to metric units with scale '0.01' (centimetres) or any other scale, except '1', I meet a bug.

Sometimes, Blender displays some values in meters. If I click into value and then press Enter immediately, it changes units to centimeters, although such operation should not change anything.

Proof: https://youtu.be/cJ-TfmF0PlI

UPDATE

It is a bug and it can be fixed.

One way is to adjust value after click. Initially it was 1.54844 m. Once clicked, it became 1.54844. Since absent units means cm, Blender should change the value to 154.844 immediately after click.

Other way is to retain unit in the window, but make it not selected, like windows do on file rename. Once I click F2 on file with extension, it selects name but extension:
By default Blender interprets input at the base unit measurement in that system. All you need to do is to input a unit as well as a quantity and this will work as expected (i.e. 12m or 12cm etc.)

As you have noted in your question, changing the Scale option changes what this base unit is. In your case the base unit is cm, so for any other unit of measure, you must input that unit after the numerical input.