Thank you for your post.
Field Labels (which are Text objects) will resize or expand to the minimum dimension when edited. This is "as designed". If you change a label from smaller to larger, you want it to expand. Likewise, if you change it from larger to smaller, it shouldn't leave empty space, and it will reduce to a minimum size. Granted, your field label is sized to a certain dimension prior to changing the attributes. However, once another attribute is selected, the label will adjust to a minimum size. This applies to any Text object.
Using the example in your video, turn off the border and fill for the text objects "Status" and "Amount". Create rectangles with the desired fill and dimensions, and then group the rectangle with the appropriate text object. The text object will still adjust to the minimum dimensions, but the rectangle will not change size.
I encourage you to enter this as a product suggestion into our Feature Requests web form at:
These web entries are read by our Development and Product Management departments where they are then discussed and considered for future releases.