Red text markup missing for John 18:6,9 (KJV)

I just noticed today in reading from John 18 (in Xiphos), that there seems to be some text of Jesus' words that should be in red that is not appearing that way.

John 18:5-9 (KJV)

[5] They answered him, Jesus of Nazareth. Jesus saith unto them, (red)I am he(/red). And Judas also, which betrayed him, stood with them.
[6] As soon then as he had said unto them, I am he, they went backward, and fell to the ground.
[7] Then asked he them again, (red)Whom seek ye?(/red) And they said, Jesus of Nazareth.
[8] Jesus answered, (red)I have told you that I am he: if therefore ye seek me, let these go their way/red)
[9] That the saying might be fulfilled, which he spake, Of them which thou gavest me have I lost none.

"I am he" in verse 6 and "Of them ..." to the end of verse 9 appear in black text in Xiphos, but in my print Bibles both are red.

This is on a Debian system, reading in Xiphos, KJV text module version 2.9.1.