starlight I only have my mac / pc to check that size with, and there it is displaying incorrect.
Can you try to give me a general CSS to define the size of the small logo?
1) The browser re-sizing can't presumably tell the actual output for certain screen-size which may differ. You may also refer to in-depth explanation given here due to which I had suggested for testing in real-time with standard device
Sometimes issues surface that occur only when you resize the window. When you load the page in a specific window size, the issue doesn’t appear, but when you resize the window, it does. This is a false positive;
However, I caution testers and QA engineers to never rely on this practice as the sole form of testing
2) Try add this to custom.css file and adjust values accordingly :
.logo .logo-control .logo-img-sm{margin-top: 30px !important;width: 80px !important;height: 50px !important;}
however, the above suggestion can be presumed to be tentative workaround which may/may not work since I am unable to replicate any such relative issue as shown by you