Steps to reproduce:
Use the code below. Select the Members tab and press the tab key - nothing happens. Focusing the DataPicker is expected.
<a href="http://www.google.com">Google</a>
<div class="RadTabStripWrapper">
<telerik:RadTabStrip ID="rtsCommitteeTabs" runat="server" MultiPageID="rmpCommitteeTabViews" RenderMode="Lightweight">
<KeyboardNavigationSettings CommandKey="Alt" FocusKey="T" />
<Tabs>
<telerik:RadTab PageViewID="pvMeetings" Value="Meetings" Text="Meetings">
</telerik:RadTab>
<telerik:RadTab PageViewID="pvMembers" Value="Members" Text="Members">
</telerik:RadTab>
<telerik:RadTab PageViewID="pvAttributes" Value="Other Information" Text="Other Information">
</telerik:RadTab>
<telerik:RadTab runat="server" PageViewID="pvCommitteeLinkDocTab1" Text="Link Doc Tab 1" Value="CommitteeLinkDocTab1">
</telerik:RadTab>
<telerik:RadTab runat="server" PageViewID="pvCommitteeLinkDocTab2" Text="Link Doc Tab 2" Value="CommitteeLinkDocTab2">
</telerik:RadTab>
<telerik:RadTab runat="server" PageViewID="pvCommitteeLinkDocTab3" Text="Link Doc Tab 3" Value="CommitteeLinkDocTab3">
</telerik:RadTab>
</Tabs>
</telerik:RadTabStrip>
</div>
<div class="RadMultiPageWrapper">
<telerik:RadMultiPage ID="rmpCommitteeTabViews" runat="server">
<!-- Meetings Tab -->
<telerik:RadPageView runat="server" ID="pvMeetings" CssClass="MeetingsTab">
</telerik:RadPageView>
<telerik:RadPageView runat="server" ID="pvMembers" CssClass="MeetingsTab">
<telerik:RadDatePicker ID="datePickerMeetingsFrom" CssClass="DatePicker" runat="server" RenderMode="Lightweight" EnableAriaSupport="true" EnableKeyboardNavigation="true" aria-label="From date for the meeting date range filter">
<DateInput runat="server" ValidationGroup="MeetingDates" aria-label="From date for the meeting date range filter">
</DateInput>
</telerik:RadDatePicker>
</telerik:RadPageView>
<telerik:RadPageView runat="server" ID="pvAttributes" CssClass="MeetingsTab">
</telerik:RadPageView>
<telerik:RadPageView runat="server" ID="pvCommitteeLinkDocTab1" CssClass="MeetingsTab">
</telerik:RadPageView>
<telerik:RadPageView runat="server" ID="pvCommitteeLinkDocTab2" CssClass="MeetingsTab">
</telerik:RadPageView>
<telerik:RadPageView runat="server" ID="pvCommitteeLinkDocTab3" CssClass="MeetingsTab">
</telerik:RadPageView>
</telerik:RadMultiPage>
</div>
<a href="http://www.google.com">Google 2</a>