Hi Albert,
Greetings from Syncfusion.
We have analysed your query. We can able to reproduce the reported issue in UG at our end and the fix will be available in our upcoming weekly release which is scheduled to be rolled out July 29, 2019. We will let you know once the UG refreshed in online. We appreciate your patience until then.
Kindly revert us, if you have any concerns.
Regards,
Kalai.