Hi Minas,
Thanks for contacting Syncfusion support.
We have checked the reported issue “Content of Tabitem disappearing when Swipping ”. We are able to reproduce the reported issue and we have created a log report for this issue. The fix will be included in our upcoming Volume 3 release which will be rolled out by the end of September 2018.
Please let us know if you have any other concern.
Regards,
Paul Anderson