In version 220.127.116.11-beta the modal was working just fine. However, in 18.104.22.168-beta when closing the modal the dialog is removed but the fading of the screen remains. In 22.214.171.124-beta the issue gets even worse - when invoking this.dialogObj.Show() an error is raised.
BSBuvana Sathasivam Syncfusion Team June 5, 2019 01:12 AM
Thanks for using Syncfusion Products.
We were able to reproduce your issue on “Dialog not rendering properly without specifying DialogButton tag helper”. We will fix this issue and included on our upcoming NuGet patch release which is planned to roll out on June 6, 2019. We will inform you once this patch release is rolled out and appreciate your patience until then.
BSBuvana Sathasivam Syncfusion Team June 11, 2019 10:25 PM
We have fixed the reported issue and it is included in the version 17.1.51-beta.