If we create a trigger with at least two items in expression, the popup window will not show links to history of the items. (1.png).
I've tracked down the issue to tr_status.php, line 547, but the problem probably lies somewhere in setMenuPopup or getTrigger.
Checking the value of the array returned by getTrigger:
$descArray = CMenuPopupHelper::getTrigger($trigger, $triggerItems);
The index of the nested array "index" starts at 1 - something futher down doesn't cope well with this.
A simple fix which fixed the issue: