While articles typically reference the oil company's (Cenovus) misrepresentations, I have secondhand information that the caprock layer of the formation is cracked, and that the leak is therefore not contained to a small area, but that produced water is surfacing in nearby fields.

This oilfield is currently SAGD, using steam to liquify and extract heavy oil.

Google has only 1 result, many here:
https://duckduckgo.com/?t=h_&q=maidstone+cenovos+oil+leak&ia=web

Does anyone know more?