Hi Tomasz,
Greetings from Syncfusion,
We were able to reproduce the issue “ ” and we confirm this as a bug and logged a defect report. You can keep track of the bug from the feedback portal below.
The fix will be available in our upcoming Volume 2 SP release which is scheduled to be rolled out in the mid of August. Would waiting for the official release work for you? Otherwise, we can provide a patch.
If you have any more specification/precise replication procedure or a scenario to be tested you can add it as a comment in the portal.
Regards,
Jesus Arockia Sankaran S