While creating a new image from an Object a new menu is created on top of Cinemachine window. It should be created on the GameObject track. Refer the attached video

Steps to reproduce:
1) Create a new project
2) Window > Sequencing > Timeline
3) Click on "+" icon > Add a Screenfader track
4) Create an image for the Screenfader track by selecting from meu

Actual result: "Creating image on Object" menu opens on top of Cinmachine window

Expected result: "Creating image on Object" menu should be created near Screenfader track

Occurring on: 2021.1.0b1, 2020.2.1f1, 2020.1.12f1

Note: Menu not available for 2019.4

Environment: Both Windows and Mac