Fill cells with a series by using the fill handle doesn't work since Update 15.35.0
Please excuse my poor english.
In one of Your descriptions it is called
6. You can also specify the type of series by using the right mouse button to drag the fill handle over the range and then clicking the appropriate command on the shortcut menu.
but it doesn't work anymore since the last Update.
If You do so, a new window is open.
You will see on the attached file.
I hope You would be able to recognise an fix it.