It's expected that there are rifts here, because Ellana can sense how thin the Veil is. Blood magic tends to do that, or so she's been told, since it's not something she would ever do herself.

Hearing the crackle of a rift, Ellana hurries closer, staff at the ready.

"Kain!" she exclaims, recognizing him from when they met in Skyhold's garden. "Do you know how to close it?"