Is the inability to centre or right flush any object (text, image, animation) in the header for the mobile resolution a bug?

If you create a new project, select empty template, responsive and then go to headers then mobile resolution, it is possible to place any object left justified, but it is not possible to centre or right justify any object.

I have worked around this issue by pretending that I have purposefully set the header content to left justify for mobile view, but in fact nothing else works and it is becoming a little frustrating.

In the attached image you will see I have added text to the header (mobile view), ensured the text box is the exact size of the header and set the text to right justified in the text box. The preview clearly shows the header text is not right flush (neither can I set it centred). Even if I resize the text box to the minimum width of the contained text, manually placing the box flush right or centred does not work.

Many thanks for investigating.