Hi pavel,
Greetings from Syncfusion Support.
1: Incorrect Aria-Labels for Delete Alert
We could able to reproduce the issue that you have reported. We had logged the defect report at our end and fix will be included in our 2020 Volume 1 release which is expected in end of March 2020. Kindly be patience until then.
2: Unexpected behavior of DeleteAlert
We have tried to reproduce the issue but it could be working fine at our end. Kindly check the below image and sample. If you still face the issue, please share as the events data object to serve you better.
3. Multiselect events issue - device(responsive) mode && 4. Cosmetic bug of header bar on small sizes (height 194 px).
Thanks for sharing sample.
We have ensured the reported issue in your shared sample at our end and it could be working fine without any console error. Kindly share the video demo for the better serve.
Regards,
Vengatesh