Archdruid Naralex and Objection - bugged interaction

Hi, today I found bugged interaction between Archdruid Naralex and Objection.
Unfortunately I didn’t capture any screenshot but I have Firestone replay of the game.

When my opponent played Archdruid Naralex while I had Objection active. Naralex was countered but it left blank spot on my opponent’s board as if there should be a minion (replay shows Naralex in that spot but in game there was no minion art or border):

[Turn 26, Action 3] https://replays.firestoneapp.com/?reviewId=0a5940ad-fecf-49d1-9bb5-df64b39c3f73&turn=26&action=3

I couldn’t directly interact with it and it seems my opponent couldn’t either (I was not attacked by this ghost minion). But When I played Mixed concoction (2x Dreadful concoction) it targeted invisible minion and killed it thus freeing board space:

[Turn 31, Action 28] https://replays.firestoneapp.com/?reviewId=0a5940ad-fecf-49d1-9bb5-df64b39c3f73&turn=31&action=28

I get that it probably is not most often encountered bug but it might be the case with other dormant minions.

Bug was encountered on PC.