Revolution Slider displaying standard 'WordPress Gallery' has display issues

Hi, I'm using popular Revolution Slider (RevSld) with GP & Elementor. It all works really well but 1 RevSldr setting does not work... though it does If you preview with another theme such as ‘Twenty Fifteen’ so I think there is a small issue with GP that I hope there is an easy fix for. (I worked with RevSldr’s ThemePunch support to discover that GP was probably the issue here.)

Details:
(Sorry it’s a bit tricky to explain.)

+ I’m using a RevSld ‘Addon’ called 'WordPress Gallery'
it allows one to 'Replace the standard WP Gallery with the Sliders of your choice'.

+ I assigned this Addon to use a special slider I made that shows the image's title and caption
AND also has a ‘toggle zoom' to full screen icon on the image.

+ On a page I created a standard WP image gallery which generated this shortcode:
(dang, can't seem to display the shortcode code... it's this with open/close brackets)
gallery size="large" ids="929,927,925,923,921,919,917” .
The images show in the slider fine BUT the title, caption & zoom icon don’t show…but do with other themes.

So I don’t know what the conflict is but would LOVE to be able to fix this since I do a LOT of artist sites using RevSld and am in the process of updating them all to use Elementor & GP. I can give you the private development site url, screen shots & WP login if you give me a private email address.

I hope I make sense!!!
Thanks for any help and thanks for making a great theme!!
Rand