I wish I had a video of this, because it’s going to be a little wonky to replicate but while I was playing an echo just now, I died to a pack of skeleton enemies that I had just feared with Transplant. However, upon clicking “Respawn” in that same moment, my HP had recovered a bit from some bone golem attacks, and the game believed I was still alive and the death and Respawn button disappeared and I was still alive and able to play.
My theory on why this happened is probably that it is part of the rubberbanding / lag glitch where when my movement got rolled back by the server, so did the attacks that killed me. But this would also mean it’s possible to have happen just because you lagged in general, which means it’s probably exploitable.