It is in this view
The attached view is from the sandbox and v13.3 while the problem occurs for one user in v13.2.
In v13.2 if I click the area where the leftmost vertical is I never get the drop down list to open. If I click the white space after the text where the rightmost vertical is then the list opens with a slight delay.
Another user cannot get it to open with a single click.
The system has a couple of thousand resources and projects.
No such problem on the sandbox. The list opens in a jiffy no matter where you click in the cell.
How would you trace where is the problem the other user has?