The patch that was shared on the lkml shows some insight on what is causing the issue. https://lkml.org/lkml/2012/7/1/27

Apparently the issues might be due "to the leapsecond being added without calling clock_was_set() to notify the hrtimer subsystem of the change", a possible fix being to patch kernel/time/timekeeping.c to be leapsecond aware.