\xt tag is not showing correctly in 10.3.1. It used to work in earlier versions (9).
A concordance link like this:
\xt پېدا ۱۷:_۶ \xt*
displays like this:
پېدا ۱۷:_0
All verses are basically shown as latin zeros.
Here is a screenshot:
This example is from the CNC in the PYPB translation available in the Digital Bible Library.
It has been created with SAB 10.3.1 using the Scheherazade New font.