In project view, I can no longer see the time spent against each task - how do I get it back?

I set up different tasks under each of my projects. Until today, I could see how much time I had spent against each of those tasks. Now, the column showing the time I have spent on each task has disappeared (for every task under every project). How do I get it back?

(The total time spent on each project is still showing and still correct. So it’s the column that appears to have disappeared not the data itself).

I also have this same issue. The hour allotment for tasks no longer shows up. I think there is a bug - does anyone have any tips?