Text window wont display subroutines

Hello,
when I call a subroutine that's an external file, the text view (both in axis and gmoccapy) doesn't update to display the called file. The code is executed correctly on the machine, and the current line highlight (red bar in axis) appears to move as if in the appropriate sub-routine file, but the displayed text remains that of the original calling file.

I've tried this with actual working files as well as simple test files, with the same results.

Is this a known limitation/expected behavior or user error on my part?

Running LinuxCNC 2.8.2-11

OK, good to know. 

Re' the discussions on github and why you would want to step into a sub-routine:
In my case, my machine performs many of its operations using one-shot tools moving on rams, clamps, and feeders, all fired off in a variety of predetermined patterns, many times per workpiece. As such I make extensive use of loops combined with parameterised, nested subroutines in external files. The current behaviour means its pretty much running blind. Debugging is very difficult, I'm having to use MSG and Debug comments everywhere.

Is there currently a way to see what the interpreter's current line is outside of the GUIs? Echoing to a terminal window or something? Even with lookahead issues it would be a help.

In terms of what typical users might consider expected behaviour, I can only speak for myself being used to a few Fanuc controls of different vintages: M-codes and remapped G-codes highlight and pause at the call, but sub-program files are always displayed and stepped through. iirc those behaviours can be adjusted on some controls.

It seems to be a difficult, deep rooted problem though.
For now I'll try to write a post-processor of sorts to make an unrolled/flattened version of each job as I use it.