I listed this as random reproducibility simply for the fact I cannot verify for sure at what stage the module is broken. However, I can ascertain the following:
1) The sectors are not held when there are no allied troops present
2) The "Sector Captured" boxes do not display correctly, only the background (no text) shows
3) I did once get a Generic Error in Expression on line 26 on a related BIS function sqf, however I cannot reproduce this nor remember which exact one it was.