Enemy deep elf summoner used summon young imp but no imp appeared

my enemy used summon young imp and it seemed to have been successfully casted.
yet i saw no imp that entire match and at first i thought it was just a graphic bug so i restarted my client.
yet i still saw no imp.
so i then thought maybe the imp was invisible and ran some detection units.
yet i still saw no imp.
so then i after killing everything else near the summoner and making sure she was definitely alone.
i attacked her and expected her pawn to reveal the imp or atleast show to me that it existed somehow.
yet i still couldn't find the imp or any presence of its existence.
then shortly afterwards the enemy surrendered.
and i couldn't really ask the enemy questions or explanations since they were a PSN player.
anyways just thought of letting you guys know about this.
incase this weird bug pops up again for someone else.