I wouldn't hold my breath waiting for Lenovo to fix this - I have a Thinkpad W520 which has a similar problem - I have to use legacy boot for it to work.
This problem has been discussed for at least the last year and several BIOS revisions haven't helped.
Don't wait for Lenovo to fix this
This problem has been discussed for at least the last year and several BIOS revisions haven't helped.