Enfold Theme is changing general Styling to default automaticly

For some reasons, the colors of the enfold theme are always set back to the default colors. But in the general styling section the customized colors appear correctly (It affects only the front-end). I have to type something in the textbox, than i can save. After pressing the save button, all colors of the front-end shown correctly again.

I didn’t find out the timestamp the colors changed back, but it happend a view times the last days. Also the newest image files are deleted when the set back happen. They are shown in the media library, but they are blank.