Thanks for your question. I have just run a quick test on my “Jetpack” development system and it looks like Carousel is working properly.
Here is the simple [mla_gallery]
shortcode I used:
[mla_gallery post_parent=all mla_alt_shortcode=gallery]
Carousel, like the other Jetpack features, works by intercepting the WordPress [gallery]
shortcode. MLA supports this with the mla_alt_shortcode=gallery
parameter that lets you use MLA to select the items you want for the gallery, then hands control off to the [gallery]
(or other shortcode) to format and display the results. With Jetpack, MLA plays no part in displaying the “thumbnail grid”.
There are many other lightbox, slideshow and carousel plugins that work in a different way. They look for the IMG tags in the gallery output and bring up a lightbox, slideshow or carosuel display when an item is clicked. Here are some earlier support topics on these alternatives:
Lightbox Option
Slider Galleries
Using [mla_gallery] with [gallery] code on the same page
How to use mla_alt_shortcode with begin[X] and end[/X] brackets.
Slideshow from media category in photonic
I hope that I have understood your question and that the above information is of some help. I will leave this topic unresolved until I hear back from you and given you any additional help I can. Thanks for your interest in the plugin.