Quote Originally Posted by Buffalobiian View Post
There's a 10min delay, but we didn't see Jinwoo watching TV and go "This is bad, I should help."

We see a cool pose on top of a building, then he stands up and thinks "It's time - Exchange."

Thus far we haven't been shown any indication that his soldiers communicate telepathically to him. Jinwoo had to guess at events when his soldiers were being killed off in the Castle level.

So, currently neither scenarios make complete sense from a continuity perspective.
His reason for not joining this raid was to stay home with his family, after the mom just got cured. I'd assume he was spending time with the sister and mother, in the apartment, possibly watching the TV broadcast with them. However, I very much doubt he would "exchange" right in front of them. He would thus first go away normally, to the rooftop or wherever, and then teleport to the island.