This is an obvious oversight that causes frustration.

When a task is linked in a Doc, hovering over it with the mouse pops up more details about the task. However, this pop-up appears overtop of the task link itself. That means there is no way to open the task view once the pop-up appears. You have to move your mouse away to get the pop-up to disappear and then click on the task link underneath before the pop-up has a chance to reappear. Either add an "open task view" button to the pop-up, or have the pop-up appear above the task link rather than on top of it.

Additionally, the "X" in the top right corner seems like it would close the pop-up, but it actually deletes the entire task link. My users do this often. This "Remove mention" button needs at least a different placement (left of the other buttons) and probably a different icon too, so it isn't confused for "Close".