That fixed it. I’ll mark it as solved.
Thank you, thank you, thank you!
Thank you so much djcottrell! I’ve put your code at the bottom of the functions.php file of my theme and added the shortcode snippet to the Simple Custom Content field.
Two issues:
1. At first, I got an error when I tried to save the revised functions.php file: “syntax error, unexpected T_PUBLIC” – associated with the second line of your code. After a quick search online, it seemed like a good first step to remove the “public ” from that line. After doing that, I was able to save the revised functions.php file.
2. I then added the shortcode snippet to the Simple Custom Content field. But on the front-end of the site, instead of seeing the values from the checkbox field separated by commas, I now see the word “Array”.
Any thoughts?
Thanks again – I can’t tell you how much I appreciate your willingness to help me!
Frank
My mistake – I’m using ACF 5.7.6 and it’s the ACF data that is not being saved when I’m using Gutenberg. Sorry for any confusion.