The touchpad exhibits this issue of slight touch to click sounds intermittently—it comes and goes. On the lower left particularly, this is definitely a build issue. This is a very common problem. At the service centre, they often don't agree to replace the parts and even if they do they opt to replace the touchpad as they are primarily trained on a technical level because they tend to think: 'If the touchpad is damaged, then replace the touchpad.' I've experienced this issue with my Asus Vivo book Pro 15 OLED(M3500). This problem wasn't solved till date.