I can only comment on one use of this spot (the Falador diary shortcut area) so far, but:
It worked perfectly during the trial hour, and for about 10-15 minutes during premium usage.
After that, for some reason I still don't know, it kept trying to make it's way through the rockfalls surrounding that area. Even though all the directly accessible veins were available.
It runs back and forth between the shortcut area and the other areas blocked by rockfalls, but doesn't mine any veins.
Quite lucky I was babysitting it, because that would surely result in a ban.
Any tips on how to prevent this? Given it worked fine for quite a while, it looks like all my settings and RuneLite plugins seem to be fine.