After entering the echo minions are able to receive infernal shade and dread shade buffs only after moving a certain distance. I can even move it with experimental teleport, but still it’s the minions who must do a few steps to receive a buff.
After the echo transition (both in and out), minions go into an invulnerable state and don’t receive damage from infernal shade, but they don’t receive any buffs either. That is a problem for dread shade with cooldown, cause it makes me unable to fight for 18 seconds (it’s a single minion build with 100% crit from dread shade).
For now the fastest workaround is to leave an echo (resets cooldowns), move the minion and then buff it, and finally restart the echo.
Weirdly, infernal shade is not ignored by the minion, but actively discarded as shown in the video. There is another bug into play, infernal shade on the ground isn’t converted into physical. So because it’s converted if cast above the minion, I suspect there is some invulnerable invisible minion