The phrase "potential flashpoint" is used to describe a situation or issue that has the potential to become a source of disagreement, tension, or conflict. Full definition
Choose your pick of potential flashpoints: rising U.S. interest rates, weakening loan covenants, or the boom in exchange traded funds. (bloomberg.com)
After matches there is often no public transport, while taxis refuse to travel to potential flashpoint areas, leaving match - going fans to walk miles to their accommodation in the dark. (politics.co.uk)