display_corrections doesn't show correct time for private messages

The module display_corrections doesn't show correct time for different versions of a message when those are private ones. For messages in a chat room it works well.

Public (works):

11:41:30 merlin8282> test1
11:41:36 merlin8282> test2

Private (doesn't work):

11:40:53 merlin8282> test1
11:40:53 merlin8282> test2