mks_button not working in widgets anymore

I just updated our Herald theme to the latest version. Installing the Buddy plugin and Redux Framework plugin fixed most things, but the mks_button shortcodes we previously had in custom HTML widgets don’t seem to work anymore. (Yes, my Meks Flexible Shortcodes plugin is still active. I’ve since de-activated and re-activated. It’s also up to date: 1.3.1) I tested the shortcodes on a new page, and that works fine…just not in the widgets.