At first I thought that the execution time for pipeline stages wasn't being displayed at all within the table of build stages on the pipeline job view since no times were being displayed in my typical browser view. However I accidentally discovered that if I resize my browser window in just the right way I was able to see a partial time stamp poking out from behind the progress indicator for the stage as shown below:

In this example the time stamp was something like "1h 5min 30s" but all we can see poking out from the edge of the progress bar is the 'n' from the '5min' part (presumably because the '30s' bit is wrapped underneath on a new line and rendered behind the progress indicator)

From what I can tell it looks like the time stamp is being rendered behind the progress bar, causing it to be hidden. This is quite annoying to say the least, but I'm also hoping it's something easy to fix as well.