We build for very specific max health, magicka, and stamina. When DDF doesn't work after dying in a BG, our entire build falls apart because we rely on those stat boots.
Please fix this bug. It is critical for battlegrounds.
When you die and respawn directly into combat something gets messed up.
Yeah it definitely doesn't happen all the time, but it does happen on a fairly regular basis. There must be some other factor than just spawning directly into combat, but that's definitely an essential part.
Considering that Treaders and DDF both have the "while in combat" rider what I would guess is happening is that when you die your buffs get cleared, but something (infrequently) causes death to fail to clear your in-combat state, and when this happens the check for "you entered combat" to proc the mythic never fires since you didn't "enter" combat it thinks you never "left" combat, so since the game state would indicate the buff should still be active it doesn't re-proc it.
Essentially, I think it's another manifestation of the perpetual "stuck in combat" bug....