Focus after End timeline element disappears later it appears after pressing Tab key twice and also reverse traversed focus trapped when we are using highstock chart in kendowindow UI

[vimalmavanicasepoint]

Expected behaviour
when we are using highstock chart in kendowindow UI
The focus must be moved to next element but skip the element, and also focus must work in reverse

Actual behaviour
when we are using highstock chart in kendowindow UI
The focus moved to class "highcharts-exit-anchor"
focus trapped when reverse traversed

Live demo with steps to reproduce
template : https://jsfiddle.net/Vimal_Casepoint/xrchjvu6/2/

Focus apperes when tab key twise

1. open kendo window
2. start focus in highstock chart
3. when focus end of timeline press tab key focus will not appear to next element
4. again press tab ket focus will appear

Reversed focus Trapped

1. open kendo window
2. Press tab key and travel forward focus
3. when focus appear on after highstokc chart
4. Try to resvesed focus in chart
5. Focus will not move first element of popup

Product version
Latest version

Affected browser(s)

[vimalmavanicasepoint]

highcharts/highcharts#20839 (comment)

The Highstock support team has identified that this issue is related to Kendo.