So, I've faced with issue in my project where a users can't select date on filter menu in grid component on mobile device.
My code has the same peace of code from https://www.telerik.com/kendo-angular-ui/components/grid/filtering/reusable-filter/ -> 'Filter Menu with Popup' section.
The StackBlitz has the same failure behavior.
Based on my investigation, I've figured out that kendo can't apply focus on date input after selecting date on calendar popup on mobile devices.