Yes, it’s been noted on here for many years, and also it happens in shamanic work and probably other paradigms.
It seems to me that spirits (and the general forces of magick) operate in terms of chains of cause and effect, not linear time, so they sometimes begin work as soon as the intention has been set. it’s probably best to still do the work you committed to, though.
I did a post about demonic timekeeping here you may find interesting: