Header row not working properly

Hi.

I found, maybe, a bug that is not allowing me to do something.
When creating a 1/4 table (data table, not price table), I set 6 rows and 1 of them, the first one, I set it as Header row. As I want to center it, I write in the field the next: <center>TITLE</title>.
So, when looking the webpage from the phone (not from a computer), you can see “<center>TITLE</title>” in top of every field of the table. Like this:

<center>TITLE</center>
————————————
<center>TITLE</center>
This is the content of row 2
————————————
<center>TITLE</center>
This is the content of row 3
————————————
<center>TITLE</center>
This is an image
————————————
<center>TITLE</center>
This is a button

In order to see it properly, you have to change the Header row to Standard row. Is there a problem with this?

Thanks!