Adjusting rotated text box is flipped

When I want to change the size adjustment of rotated text boxes (90° counter clockwise) from manual to automatic, the right adjustment handle changes the hight and the bottom one the width - They are flipped.

I added a video, as requested.

Step by step:

1. creating a text box
2. rotating the text box
3. changing it to "area text"
4. resizing the box
5. double click the bottom indicator BUT instead of adjusting the hight, it adjusts the width.