running the latest Sierra. On an imac and a macbook pro. The issue has been happening since 10.12.3. if i am scrolling through messages and come across reltead ones and click a related message one after another, they wont show. if i click on an unrelated message and then back to a message that previously didnt show, that previous message will then show. So messages will only not load if you click on related messages in a row. Ive tried everything and cant find a fix. fresh install and several others.