According to a news source, Samantha Ko (高海寧) and her boyfriend, Tang Chi Wai (鄧智偉) ended their 5 years relationship after developing his career in Beijing, and having an affair with a local girl behind her back. Hence, she is disappointed in him and stops following him on his social media account. Both are pointed to separate for 4 months but Samantha dismissed it and rejected to reply, upon replying to the media.

Source: https://ol.mingpao.com/ldy/showbiz/latest/20200428/1588066886888/%e3%80%905%e5%b9%b4%e6%83%85%e7%8e%a9%e5%ae%8c-%e3%80%91%e5%82%b3%e9%84%a7%e6%99%ba%e5%81%89%e6%90%ad%e4%b8%8a%e5%8c%97%e4%ba%ac%e5%a7%91%e5%a8%98-%e9%ab%98%e6%b5%b7%e5%af%a7%e6%9c%89%e5%98%a2%e8%ac%9b