[O] Org-agenda and error in tags position

[leo]

Hi! I write because I am experiencing a problem with org agenda and
more precisely with the positioning of the tags which as can be seen
from the screenshot are always displayed on a new line (while I expect
them to be displayed to the right of the task).
It only happens with org-agenda. In .org files the display is correct

The problem is with Org 9.2.3 and Emacs 26.1 on xubuntu 19.04.

Here a screenshot of how the org-agenda view appears:
https://share.riseup.net/#E1pz3vlYKm27KKTSTQE6qg

I also tried a new .emacs configuration but nothing changes.

Here the part of my configuration concerning org agenda:
https://pad.riseup.net/p/Nv-AnovgxUkUlXwz3HzC

I researched but did not find similar situations and a solution on the
web.

Can you
give me a hand?

Thanks a lot,

--
leo