Alain.Cochard@unistra.fr writes:

> Then, to observe the problem, I can for example compare
>
> (1) visiting the file pb.org containing:
>
>    #+STARTUP: noindent
>    * headline 1                               :htag:
>    *************** inelinetask             :itag:
>    *************** END
>    * headline 2                       :htag:
>
> and doing C-u C-c C-q,  to 
>
> (2) the same, but with 'indent' instead of 'noindent'.
>
> For me, all 3 tags end up perfectly aligned in the case (1), while
> ':itag:' is shifted to the right in case (2).

Thanks for reporting!
Can you try the attached patch?