There are two Planned Hours fields for Tasks. One has "work" as the textmode valuefield, the other has "workRequired". What is the difference between the two?
The "work" field is an older field that has remained around because it is being used by some people. It shows "Work" as the column header and displays the values as numbers. The "workRequired" field is the newer field that is more commonly used and exists on the system default view. This field displays the values with a number, followed by the word "Hours". See the below screenshot showing these differences: