I am far from being a diff locker expert, but I would have thought that if you are cornering, it is unlocked - that's what a diff does.
If you put down power around a corner it has 2 options:
1: Lock up, which mean you have no diff action and will scrub tyres and get transmission wind-up
2: Stay unlocked, which means you are driving through only 1 axle
I don't know which option happens, but someone will come along with an authoritative comment....

