What version of jD have you updated from? There have been some changes in the modules to meet WCAG requirements. This includes a change from a <table> strucure to a <div> structure as noted in the release notes. There are extra facilities in the module. There was an extensive test phase but maybe you have a different setup combination
The module is working ok on my test site but maybe you had different settings in your previous version - please check the settings in the module, one of these is to show or hide the title.