On my copy of build 188.8.131.52 after first execution of a statement the Messages tab is updated correctly.
However, subsequent executions of statements ARE NOT updating the messages tab of results.
If however, I change the filter from “All Items” to anything else such as “Statement” then the tab refreshes and I see the previous execution’s message.
So there appears to be a refresh bug introduced in this build. Again, after every execution of any statement I now have to toggle the display to/from All Items and something else like Messages before I can see any results. I’m hoping that your internal QA team already picked up on this. But if not, please fix before the next build.