In 22w45a, tooltips now appear when tabbing to GUI elements, which is a great UI improvement. However, they seem to interact with the mouse in a way that is not immediately obvious to users.

Tooltips will always stick to the mouse when a GUI element is hovered or focused. This means that the tooltip for one element can appear over another element. If there is no mouse within the window or at all, the tooltip will not appear.

Ideally, tooltips will stick to the mouse when hovered (since hovering implies that the mouse and thus tooltip is within the element's bounds) or a fixed point when focused. For reference, in addition to a vanilla screenshot, this issue includes a screenshot of how the 'Mod Menu' mod was negatively impacted by following the new vanilla behavior.