Envira gallery Light – no titles of images

Hi,
I′ve updated to Envira Light 1.5.0.2 and WordPress 4.5.2 and the titles of images in the new galleries don′t display. I′ve checked the text in Media – OK. When I stay by mouse over the thumbnail there is a small title. But there are no titles during the Picture showing. The old galleries made in older Envira work still well.

web: https://www.ho-start.info/fotogalerie/envira-galery/

Good old gallery (the titles are shown during photo show under the lightbox)

New gallery without titles (titles only shown when mouse above the thumbnail, not during the show)

Setup of Envira is normal.
Envira Caption position setup: Inside. (I tried float – the same problém)
I also use the plugins (all the latest version):
WP-Super cache
WP Smush
WP Jetpack
Content Views

and a few next ones

Many thanks for your help!