Hello, me and some of my friends tried to do the lighthouse boss #1 (we were three) and only one was teleported and was allowed to complete the story. Me and the other unlucky fellow reset our characters to get out of the room and got soft locked because we don't have access to the second boss (didn't get the key).

Additional info: After we defeated one boss, another one spawned and killed him too. After that, the lucky teammate got teleported while me and the unlucky fellow got stuck there. After 10 minutes of waiting we've decided to reset our characters as it was probably a bug where it doesn't teleport us. We've traveled back to the safehouse, interacted with the soul crystal and confirmed that we've killed the boss. After that, we couldn't do anything.