https://drive.google.com/file/d/1y1OKAltuqzc_26rWTlqfELLWBKXTarzs/view?usp=drivesdk
Reward screen picture in link^
This has happened to me twice now once with the organ pipe puzzle and once with the one with the electric wall node things after completing it going into the portal and collecting the "reward" nothing is given after finishing the mission