Hi Adam,
Thanks for your interest in Syncfusion products.
The reported behavior is found to be an issue and has been fixed. Please create an incident undet out Direct –Trac support system if you wish to receive a patch for this fix.
Direct Trac link.
http://www.syncfusion.com/support/directtracI have attached a sample having an workaround for this issue in the following link
[Sample Link]
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=TrackBarExSample1896610211.zipPlease refer the sample and let us know if you have concerns on this.
Regards,
Iniyen M.A.