Forum showing unread discussion when all discussions are read
I have been having this issue since the day one when running 3.3 and now I am running 2021.012 and the issue is still persistent. Please note I am using the 'Unread Category Photo' plugin and the home page of my forum is set to Category view.
Yesterday I marked the entire forum as read and as expected everything was marked as read all, categories were showing that there were no unread discussions. This morning a new member joined and I read their message but when I went back to the home page the site still showed the Introduction category had unread discussions. I thought maybe it was pulling the image from cache so I did a hard reload of the site to ensure it was pulling new content if available and it was still showing as unread discussion in this category. When I open the category there are NO unread discussions.
This issue has plagued me since day one and I was hoping that a different issue we figured out about MySQL not returning INT values form the database was the issue but sadly the issue persists. Any ideas where to start looking to see why this is happening?