For some months now this has been happening. I’ve tried to work out a pattern. My daily habit is to check the “New” posts. https://community.justinguitar.com/new
For topics that I reply to, they stay as “Normal”.
For topics that I read and don’t reply to, most of the time they stay as “Normal”, but intermittently and on multiple occasions, they get set to “Tracking” and even though I have not replied, when others do reply, they appear as unread: https://community.justinguitar.com/unread
This is a minor annoyance.