I played version 5.1 the one that is for the moment public. It only seemed to have happened in the mines, it only occurred once. I am guessing when I had leveled up while using the cape I had done so on a frame in which the swords would be used, animation overlapped as did the rest with the exception of the wand that unfortunately didn't go anywhere. I should've probably took a screenshot in hindsight to show that. But essentially, it looked like all 3 of them were being released by the instant they were used. By memory the items were:
Cape, Glove, Sword, Wand, Arrows, Belt, and that's as far as I can remember. Oh, right the knock back helmet and the boots. Those were the other support items.
But as far as I know the combination of when I got them was likely the culprit. Since I had reduced the cooldown and nearly maxed out the cape at that point. The speed of the animations was instant which is probably why the wand got nixed when I got the arrows, there simply wasn't enough sprites to fit on the screen with how fast the cooldown was. I hope you find what the issue was since, when it happened it didn't look like the wand was even going out at all.
Either way, I look forward to the next update and perhaps some more music variety. Best of luck going forward! I'll be following this as it updates. I hope you are well, sorry for the lateness of this response I had only gotten up just an hour ago.