Prior, the click behavior would open the message, now the click opens the event to be monitored. I'm fairly sure this is an unintentional bug. It's very annoying and clashes with the solarwinds design language of drilling down.
If this was intentional, the "add to monitoring" column is redundant and should be merged with Message (<--- I dont think this is better than the above, but better than in live)
This behaviour is visible in oriondemo