Hopefully you'll bear with me so I can confirm my understanding. It may be a bug, or we may have uncovered a set of issues we're not showing on the Summary page and we definitely want to fix that. Please see the attached screenshot which I will reference:
It sounds like you're saying:
a) On the left hand side in the Tree, you see a host with a warning icon (mine is Red in this example)
b) On the center area in the Host-> Summary pane, you don't see anything like the Yellow box I have (which reads "Cannot Synchronize Host..." and "Host Connection and power state")
Additional question:
c) If you go to Web Client "[that Host ]-> Monitor -> All Issues", do you see anything in that list? If yes, can you include a screenshot of that?