We upgraded Gantt to v9.0.15 and noticed that links now how rounded corners but when exporting them to a PDF the curved corners does not show.
We even added the default CSS on to the Export CSS file but the corners did not show when exporting to PDF. Any solution to this?

added css to Export CSS file:
.gantt_link_corner{
width: 4px;
height: 4px;
border-color: #000;}
.gantt_link_corner.gantt_link_corner_left_down{
border-top-width: 2px !important;
border-left-width: 2px !important;
border-top-style: solid !important;
border-left-style: solid !important;
border-top-left-radius: 4px !important;}
.gantt_link_corner.gantt_link_corner_down_right{
border-bottom-width: 2px !important;
border-left-width: 2px !important;
border-left-style: solid !important;
border-bottom-style: solid !important;
border-bottom-left-radius: 4px !important;}
.gantt_link_corner.gantt_link_corner_down_left{
border-bottom-width: 2px !important;
border-right-width: 2px !important;
border-right-style: solid !important;
border-bottom-style: solid !important;
border-bottom-right-radius: 4px !important;}
.gantt_link_corner.gantt_link_corner_right_down{
border-top-width: 2px !important;
border-right-width: 2px !important;
border-right-style: solid !important;
border-top-style: solid !important;
border-top-right-radius: 4px !important;}