The patch (v4.2.1) is now available.
See below for details.

■ General Fixes Applied to Mitigate or Eliminate the Bugs Shown Below
・ 2 duplicates of an Unavailable Player is shown in My Team. This is triggered by going to [Home] > [My Team] > [Players] > [Action] > [Filter] > [Card Type] and selecting both [Standard] and [Unavailable Player].