Widget not staying in widget area

Thanks for making this plugin – it’s doing exactly what I need, except for one odd thing. I’ve created a custom widget area for my theme header, which I can edit through Appearance > Widgets with no problem.

I can drag a widget to the area, add content, hit save, and then that content appears in the header like I want. However, if I leave the Widgets page and then come back, that widget I dragged into the custom widget area is no longer there. The content I typed in still displays in the header, but the box to edit it is no longer in the newly created custom widget area on the Appearance > Widgets page.

To do anything, including remove what’s displaying from the header, I have to drag a new widget into that area, save it, and then delete it, and then that removes the original displaying content from the header.

Did I miss a set somewhere along the install that would cause this behavior? Thanks.

https://wordpress.org/plugins/wp-custom-widget-area/