I don't use global it is broken for me, EEA works but that's just some weird Frankenstein MIUI build..
Please note after I flashed Global my phone was acting weird, crashes, overheating etc..
And to fix that I had to flash the latest EEA fastboot build, before EU to have it working again.
( EEA was what the phone came with, maybe is different for you )
But I use the latest EU beta and cannot it confirm that. How do you measure the fps? Here if I have the display set to 60Hz it jumps to 120Hz while unlocking.