Premiere Pro Aspect Ratio

[CVUser]

Hi I have my aspect ratio to 2:1 for my settings in premiere pro with vignette on my clip I've done this 10/10 and never had issues. When exporting there's a section the bottom that's not vignetted need to know if its a sequence setting issue or export issue. Attached is a picture let me know thanks. It's a little hard to see but the bottom just cuts off an there's not vignette happening.

[Ann Bens]

How did you make the vignette, as there are so many ways of doing this?

[CVUser]

With opacity mask.