if you use the afk mode it acts like an afk player so it will be slower else it will be instant.
I will remove the chiseling while walking, it's not worth doing in my eyes, especially on mirror it's way to slow and not worth
Well if you select potions and it there aren't any stam and super energy potions left it will just stop running indeed.
Will take a look at the CLI file
EDIT:
Fixed the issue and should be solved in V1.07, make sure to save the files again when that version is live