You may have picked up the glowing amulet and may not have noticed it! I was also affected by the glowshroom bug and I didnt even notice I got the amulet lol
Ya idk where i got it from because i remember i lost my shrooms by using them in crafting. But maybe I somehow got one from somewhere else by a bug or something? And also maybe you don't get more glowshroom if you already have the amulet
