When the "Track Time" window is active, the check boxes for choosing Tags or Status detach and float and get extremely small on my 3840x2160 screen. As soon as I close the "Track Time" window, the boxes return to normal. This may be a Windows problem but I thought I should mention it.
Henrik
ps. I found out that the scaling issue only turns up when ToDoList is active on my laptop screen (3840x2160) and I move the time tracker box on my secondary screen (1920x1200) - so, no big deal. The calendar is not affected but the other drop down lists (e.g. Status) are.