We found out that Google shows different site titles on the SERP depending on whether the search happens on mobile or desktop (see images below). We set the title tag to be "Rise above mundane tasks with colabel" as correctly shown for the desktop search. However, the mobile result picks the first item from our navigation menu – "Why colabel?".
I found two related issues but neither of the two expands on differences between mobile and desktop. Is there a way to change that on mobile?
Mobile search result:
Desktop search result: