disruptive
adjective
uk/dɪsˈrʌptɪv/ uscausing trouble and therefore stopping something from continuing as usual:
An absence of disruptive interpersonal issues makes for a healthier workspace.
The start-up has always been a disruptive force in the market.
If this immigration regulation is deemed to be disruptive to the rest of the EU, controls on free movement could be re-imposed.