full screen slider has padding on left and right

Hello Support,
Since yesterday I have the following problem on my website (WordPress 4.7.2) using the Enfold theme (version 3.8.5):

The full screen slider is no longer as wide as the screen. It has a left/right padding of 50px. I prepared a test page that contains only a slider with the following code:

[av_fullscreen size='no scaling' animation='fade' autoplay='true' interval='7' control_layout='' scroll_down='aviaTBscroll_down']
[av_fullscreen_slide slide_type='image' id='3636' position='top right' video='http://' mobile_image='' video_cover='' title='Des activités de pleine nature' custom_title_size='30' custom_content_size='21' caption_pos='caption_left caption_left_framed caption_framed' link_apply='button button-two' link='lightbox' link_target='' button_label='Vous êtes une entreprise' button_color='light' link1='page,3254' link_target1='' button_label2='Vous êtes un particulier' button_color2='light' link2='page,3263' link_target2='' font_color='custom' custom_title='' custom_content='' video_controls='' video_mute='' video_loop='' video_autoplay='']
Coachées par des professionnels de la santé et du plein air.
[/av_fullscreen_slide]
[av_fullscreen_slide slide_type='image' id='3630' position='top left' video='' mobile_image='' video_cover='' title='Dans le sud de la france' custom_title_size='29' custom_content_size='18' caption_pos='caption_right caption_right_framed caption_framed' link_apply='button button-two' link='lightbox' link_target='' button_label='Vous êtes une entreprise' button_color='light' link1='page,3254' link_target1='' button_label2='Vous êtes un particulier' button_color2='light' link2='page,3263' link_target2='' font_color='' custom_title='' custom_content='']
Profitez de la région ensoleillée de Montpellier !
[/av_fullscreen_slide]
[av_fullscreen_slide slide_type='image' id='3638' position='top left' video='' mobile_image='' video_cover='' title='Au coeur des plus beaux sites' custom_title_size='30' custom_content_size='24' caption_pos='caption_bottom caption_bottom_framed caption_framed' link_apply='button button-two' link='lightbox' link_target='' button_label='Vous êtes une entreprise' button_color='light' link1='page,3254' link_target1='' button_label2='Vous êtes un particulier' button_color2='light' link2='page,3263' link_target2='' font_color='' custom_title='' custom_content='' video_controls='' video_mute='' video_loop='' video_autoplay='']
Dans une ambiance ludique et détendue
[/av_fullscreen_slide]
[/av_fullscreen]

Please let me know what can be done to fix/avoid this bug.

Thanks