I agree with Chris.

+substantial amount of time first "ping" the issue on the `issue tracker`_

I would add a comma after 'time'.

> I don't like the "substantial amount of time" part (yes I know it
> was already there).  That should probably be replaced with something
> more concrete, e.g. one week.

That really depends on the situation.  I think the point of that sentence is to make clear that some time might pass before someone can look at the issue, and I'm not sure it's necessary to quantify this.