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.
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: