Users are experiencing issues with the @ mention function, requiring multiple attempts to successfully tag someone. While some report that it works intermittently, others suspect their older computers may be the cause of the problem. Discussions include potential solutions like reinstalling Windows or trying Linux-based operating systems, with users sharing their experiences on different platforms. The conversation highlights the frustration with technology quirks and the unpredictability of computer performance. Overall, the issue seems to have resolved for some, indicating a possible temporary glitch.