The image slider uses the Master Slider plugin, so our theme updates don’t affect that.

And I’m really not sure why it was working before and not now. The only reason I can think of is a setting in the slider was changed.

What you can do is use another slider plugin.

Here is a recent post we published which compares the top 10 slider plugins,

Top 10 Image Slider Plugins for WordPress Compared

You can choose one of those sliders and insert the shortcode in the same field where you entered it for the Master Slider.