Twitter said on Thursday that it had overstated its monthly-user figures since 2014 after mistakenly including data from third-party applications in its counting.

The revelation came as the company reported that its net loss had narrowed in the third quarter and that its number of daily active users had risen 14 percent.

The disclosure could nonetheless do further harm to Twitter’s reputation as the company contends with scrutiny over its role in Russia’s efforts to meddle in the presidential election, complaints about what critics have called its scattershot efforts to prevent abuse and harassment on its platform; and skepticism among some investors concerned about its slowing user growth worldwide.