Stealth disappearing mid-fall

The woman in black came over the hedge. She spun in the air and her cloak spread like a huge set of wings. It blotted out the sky as she came down at Franklin and the squad’s sergeant, Monroe. Their weapons came up and twin bursts ripped into the darkness. Her descent didn’t shift in the slightest and shadows raced on the ground below her. The sergeant fired another burst as Franklin dove to the side. She came down on the sergeant. He fought for a moment, a thrashing shape beneath the cloak, and then he tossed the fabric aside.
“Nothing,” said Monroe. “Just her cape. She’s gone.”
“She was there,” said Franklin. “We saw her.”

Excerpt From Ex-Patriots, pg 194-195
Peter Clines
https://books.apple.com/us/book/ex-patriots/id585738393