This is related to other problems associated with how Today/Upcoming/Later status works. But, the current inability to change said status while in a searched list of tasks is a huge problem. Why?
You have lots of tasks due today. They initially come up in the Today section of My Tasks. You set some to Later to clear out your Today view in My Tasks. Days pass and you need to get those Later tasks back to Today in My Tasks. So, you do a search to find all incomplete tasks and sort by due date. You find the tasks that were marked for Later and change their due date to today. However, that DOES NOT automatically also change the “status” to Today which is should. Then you figure you can go in a change the status right there but the option to change from Later to Today is not available. Frustrating and not a good UI at all.