Board Thread:Questions and Answers/@comment-28648393-20160728233147/@comment-4439289-20160819043309

I think Ichigo still has his hollow and quincy powers. If we look at the other quincy who survived the holy selection, they were only weakened by it but they could still use their quincy powers as Yhwach couldn't strip them away completely.

The same could be said for Ichigo as his Bankai still remained intact. "Hichigo" and the "Old man" are the source of Ichigo's spirit energy, so the fact that Ichigo could still use Getsuga Tenshou on Yhwach does mean that Ichigo still has spirit energy.

Also, Ichigo didn't seem surprised when Bankai broke apart to reveal his old Shikai, so this might indicate that it is natural for the blade to do so.