I´m not sure whether this is a question for you or ubermenu3 plugin authors….
I have a secondary menu above the header. In the desktop, the menu image is correctly positioned left to the text, both text and image are aligned to the right margin.
On mobile, text stays on right side, but the image is shifted to the left margin. Where is the problem? If I use icon instead of image, than it is properly positioned next to text even on mobile.