Upfront not saving changes on multisite install

I have reviewed the other cases in the support area about this issue but haven't seen anywhere if there has been a resolution to the issue. Just as a test I loaded spirit to the root site on this multisite install and went to the site and clicked on upfront. See the image attached.

Then I changed the text in the first box from trainer to trainers and hit the save button. It then gives me the message saved but still shows the save button in green. See second screenshot.

Then I click to go out of the theme editor and it gives me this message:

"Are you sure you want to leave this page?

You have unsaved changes you're about to lose by navigating off this page."

If I navigate off of the page the changes are not saved. How can I get this to work as it should?

Thanks.