I just updated from 8.x to 9.1.5 and the task log (right click on the task > task log) isn't working the way it used to for tasks in a loop. Previously, each run of the task would have a log entry. Now, it seems to only show the last run, or the most recently completed run, if viewing the log while the loop is still running. It would be useful to see the results for each time the job runs.
In the job log, you can still see every run of each task, including each time a task runs in a loop. However, it's harder to find what I'm looking for this way if there are several tasks in a loop, but I only need to look at one of them to verify it ran correctly each time in the loop.