Redsec BR fire ring dmg over time when near it is fatal if low HP.
In previous versions, the slow damage over time effect from being NEAR the fire ring (but not IN the fire) would tick down your HP to almost nothing, but it would not kill you. However, in update 1.4.1.0 that fire damage does seem to be fatal.
This has occurred to me and my teammates (ranked BR) several times, no sources of damage OTHER than the fire (nobody shot us, no fall damage, etc.).
I don't have recordings of this happening to me or my teammates, but I did find this from a stream a few days ago. You can see him die pretty clearly from the ticking fire damage, and he did not go INTO the fire:
https://www.twitch.tv/klass/clip/BelovedSweetCheetahSwiftRage-Qwd-4j16DsokYKAH
I couldn't find any reference to this being an intentional change in the patch notes.