J32 is ignored

[ISSOtm]

This is a limitation of the dn macro only being able to store 5 bits (0–31), yet being passed 6-bit values (0–32).

The fix I've used in fortISSimO is to “always jump”, wherein the tracker (or teNOR, in fO's case) replaces a 00 (lack of jump) with the following row's ID.