The Lighting Controller

I appreciate in version 9 that it's possible to edit these details in bulk by selecting several of the same types of fixtures and modifying them as one, but when I type in the details (such as X, Y, Z dimensions) and press enter or tab, the value in the dialog box jumps to a value that I did not choose. The only way to get my precise dimension is by dragging the bar, which is inefficient. Any way to fix this?

Thanks very much.

We are presently not able to reproduce this problem.
Could you please post a link to a video showing it ?