May 20, 2019 03:20 AM|Jenifer Jiang|LINK
I‘m sorry that I could not reproduce your issue.
As you can see, my sample works well on my side.
My guess is that maybe you have add some styles that have cover the default setting or maybe it is the control's self reason.
About the telerik controls, I suggest that you could go to there official community to ask for help: https://www.telerik.com/forums/community