They're signs of grief. To be honest, I'd love to take a couple of months off, but I can't. Such feelings may persist for months. With healing, however, they often subside. It's a time when people are trying to reorganize their lives.
Work therefore needs to be orderly.
For Clendening indecisions, unreturned phone calls, sudden schedule changes were incredible frustrations in his early grief. Normal business pressures often hit me at the power of 2 or 3 just because of the energy it took to get to work some days. It can affect the morale of everyone. If you treat an employee shabbily, and people see that, it sends a poignant message. Treat them well in their time of need, however, and they'll never forget it.