I apologize for the inconvenience of this particular bug.
In preparation for some upcoming changes to the IDE Tools, we had to upgrade our style framework from Bootstrap 2 to Bootstrap 3. This change required significant front-end code changes throughout the IDE Tools, and much of our internal support / admin tooling. It was this upgrade that caused the regression with the Live Logging feature.
I have created a bug ticket for the Live Logging issue, and plan to have a fix coded early next week. While not nearly as detailed, the Live Polling feature found under “My Locations” and “My Devices” can provide some of the same information regarding installed SmartApps and Devices in the interim.
Once again I apologize for the inconvenience and appreciate the feedback.