I have the same problem as in this thread. Uber Menu resets to default style whenever another customization is done. It looks good in customizer but not front-end. The temporary workaround is to always resave Uber Menu after any other customization is done.
I have tried deactivating plugs. I have the latest versions. I do have child.
It seems a bug of UberMenu as we have seen this for other users. Kindly toggle options and re-save them after doing customization for now while we get a fix from the developer of UberMenu.