RKRajesh Kumar Anburajan Syncfusion Team November 10, 2016 11:36 AM UTC
Hi Michael Salzlechner,
Thanks for contacting Syncfusion support.
Query: “Ribbon Tab Z-Index”.
We were able to reproduce the reported issue with jQuery UI dialog. So set the maximum z-index value or set same tab value to the dialog after creating it. Hence resetting maxZindex in control level is not a valid scenario in all cases so use the below workaround to achieve it in sample level.