Hi,
Just to update you, this has been fixed in our GIT version control repository. A new version will be released on Moodle.org soon. To get the version with the fix sooner, the zip file for the latest version can be downloaded from here: https://bitbucket.org/covuni/moodle-theme_adaptable/branch/master. This would mean you would need install manually of course and FTP the files over to the server to replace the existing Adaptable theme installation.
Thanks,
Manoj