I am not getting popups/notifications for some replies

Some replies are directly going to previously read section. It happened couple of times now, I didn't get notification for these two replies, I thought may be I had my browser running in the background. But it happened again for these, replies. I did get notifications for the replies posted in between the mentioned replies.

I browse tildes mostly on mobile using Hermit. One can get notifications on your mobile from hermit lite apps by adding a url and a css selector, I used tildes.net/notifications/unread as the url and [div.logged-in-user-info:nth-child(4)] as the css selector. I did get notification (on my mobile) for couple of times but most of the time I didn't so I deleted the web monitor. It should be noted that I didn't know what I was doing. So how do I fix this? :(