I do not encounter the mentioned problem with latest X2Go client on Windows 7 or Mac OS X 10.10.5 to Fedora 24 x86_64. Xfce sessions are in use here. What do you use?
Perl version on my F24 computer: $ rpm -q perl-DBI perl-DBI-1.634-3.fc24.x86_64
perl -v
and which perl
result in same output.
Can you try an installation from scratch of Fedora 24?