Since a few Versions, we (on macOS) cannot check the checkboxes on comments. When we do, another comment appears (each time we click) stating that the checkbox has been checked (but it does not show ith checked).
When working with hundreds of comments, often using from different computers, it is imperative to know, which ones have been dealt with and which ones have not.
Please fix the checking of the comments (and have a look into why those only work for the computer they have been checked and are not being displayed correctly on other machines!).