Responsive problem, Extend my mobile window

Hello,

I’m trying to get my lightbox working on a mobile device. But when I open my image with the lightbox plugin he broke my responsive design and extend to the native size from my window.

I don’t know if I’ve done something wrong or maybe my meta viewport is missing something…
See image below:
My mobile site under Chrome Dev Webtools

Normaly my mobile site is set to 375px width and when I click on my image to get the lightbox it become 1000px width.

Any suggestion?

Thanks in advance

Cheers

Dan

https://ww.wp.xz.cn/plugins/wp-lightbox-2/