That report could also potentially be by someone using OptiFine, but I don't see how a performance-based add-on could add a possible death. I've played since 2013 and never seen this death message, so it'd be nearly impossible to recreate in a completely vanilla world.
Optifine shouldn't have any effect on how you die. Another report of the death message was described here: https://bugs.mojang.com/browse/MC-195467
That report could also potentially be by someone using OptiFine, but I don't see how a performance-based add-on could add a possible death. I've played since 2013 and never seen this death message, so it'd be nearly impossible to recreate in a completely vanilla world.