No secondary menu on mobile device (Android Browser)

Hello, I love Catch Box and use it on my blog site Lean Self. For social links, I use a secondary menu. Unfortunately, this does not appear on mobile devices (plain vanilla Android browser). Only the main menu shows as pop-up (which I like this way). Have I configured something wrong or is this just not possible? I have latest Catch Box version installed. Is there a workaround? I looked through this support forum and the Internet and found now solution on my own. Thank you for your help. Best regards, Jens Woinowski