As noted elsewhere in this thread this one looks like human misunderstanding and has already been raised internally for fixage.

Shame it slipped through the cracks, but at scale eventually something's going to no matter how hard you try.

Are they deliberately getting their modifications under an pseudo-incompatible* license? This is the only reasonable explanation I can think of.

* IANAL. Although Apache 2.0 and MIT are compatible, using a different license makes it awkward for changes to be merged upstream.

The biggest change between Apache 2.0 and MIT are related to patents. INAL but the Apache 2.0 is a lot more safe in this aspect.