In Patch 15.2.7380, it says “Fixed an issue where the Golden Horde Shaman could duplicate a relic if a relic Ovoo is built while conversion is active”.
But there is still a very similar bug here, by using shift not conversion.
This directly affects the game balance, I had to remove all the relics from my self-made map, then only play custom games on these maps, otherwise, you would inevitably encounter players who use this bug, please fix it as soon as possible.