Tried with all other plugins disabled:
Is there a way to control max-width on a lightbox popup? It does not respect the parameters entered for the shortcode. I saw someone previously asked that question in 2017 but it was never answered. Thanks.
Sorry I should have addressed this in 2017. I just released a ARVE Pro update that introduces the lightbox_maxwidth shortcode parameter. You can control the lightbox width with it.