I haven’t seen this before with any other character on Blightreaper yet, but with Unchained(Sienna) I died twice back-to-back missions with nothing even attacking me because of some random kill floor/ceiling.
Off-host, roughly 90ping/latency
Death 1: https://gfycat.com/compassionatelonecrocodileskink
Death 2: https://gfycat.com/oblonginexperiencedalaskanhusky