The derivation of more than two slide shows on the page no longer appears at all the slide show. Brought three lost and the other two. Removes one, everything is fine. Are there any limits on the output or a bug?

PS:
com_phocagallery_v2.7.6
plg_content_phocagallery_2.7.2
plg_content_phocagallery_slideshow_v2.7.1