Hmm, it's not happening on the demo site, which is running the same version of the theme:
I've tested it on two other installs and can't reproduce this.
Did you make changes in a child theme? If so, try deactivating the child theme and activating the parent theme alone to rule out an issue with the child theme.
If not, it's possible a change was made during the customization process that's incompatible with a recent theme update. You can check readme.txt to see a change log of what's been done.
It's also possible something was corrupted during the update process, in which case you can try re-installing the theme. Also go to Appearance -> Theme Options and hit Save Changes to ensure the database options have saved properly.