Hello, Ubisoft, I am currently playing in High preset in 1080p borderless mode and I get an average of 50~55 fps in gameplay.
Whenever I switch to fullscreen with Vsync on, though, my framerate drops to 30~38 for some reason.

I think Vsync is just buggy and needs a fix? or am I the only person who has this issue?

My PC:
CPU: i7-2600k
GPU: GTX 970 Gaming
RAM: 8 GB
HDD Drives

Cheers!