Echoing Horn knock out bug?

Yakrav

I just finished a game where I was playing a Zoroark deck. My Hisuian Zoroark used Doom Curse on enemy Blissey V and succesfully knocked it out.

During my next turn I used Echoing Horn to pull the same Blissey V from their discard pile and it was instantly knocked out. No animation, but I guess the H. Zoroark's Doom Curse makes the Pokemon knocked out for the duration of my whole turn?

I was forced to take two more prize cards (4 total) due to this bug. Or did it work as intended? I doubt it.