Twitter has disclosed bugs related to how the company shares personal information for ad targeting purposes. According to TechCrunch, in a blog post on its Help Center about the latest "issues" Twitter says it "recently" found, it admits to finding two problems with users' ad settings choices that mean they "may not have worked as intended." The bugs relate to tracking ad conversions and users' web browsing activities. According to CNET, Twitter users who clicked or viewed an ad for a mobile app since May 2018 may have shared data about the experience with third-party measurement and advertising partners. Both bugs appear to be in breach with the EU's GDPR, especially after the UK's privacy regulator warned in June that systematic profiling of web users via invasive tracking technologies such as cookies is in breach of EU privacy laws.