Hello,
Thanks for posting your question about changing your font. I’m sorry to see you are experiencing frustration from this issue. I can understand being frustrated when something should be working and it is acting up!
I went ahead and attempted to replicate any issues with changing the font, as you described. However, I was unable to replicate any errors with my installation of BoldGrid.
I recommend you create a backup of your website and then proceed to update your WordPress, Plugins, and Themes. If the issue you are describing persists after those updates have been completed (or you are already running the latest versions) I recommend disabling any “Builder” type plugins or plugins that were downloaded with other themes. Sometimes, their capabilities and code can conflict with the capabilities and code of BoldGrid causing unexpected behaviors.
In my experience, those are the common resolutions to random unexpected behavior like you are seeing. Please feel free to reach back out if you continue to experience issues. I hope this helps!
Sincerely,
Carlos