Also, it appears to have left off the horizontal axis label ("hours") and moved the horizontal axis values from the middle of the gridlines to fall directly under each gridline.

Humans for the win.

Totally agree (but this human couldn't be bothered to faff about creating some axes for what is really just one question of about 20 in a support booklet!)

It's actually added the label "hours" itself, which was missing from the original graph. I asked it to change it, as it should really be "days"

Sorry! AI has learned all our bad habits...

It has put the numbers under the lines, rather than under the spaces. But as it’s a bar chart, there should be gaps between the bars anyway as it is a discrete distribution. I suppose you could turn it into a vertical line chart.