Didn't Get the sticker after completing the "Wandering Trader " sticker mission in EXPLORATION MAP

After completing the "Wandering Trader" sticker mission in the 15th Anniversary map, I never got the Wandering Trader sticker. I have checked the records of each mission point (telescope), and they all show instructions for mission completed. I would like to ask if this can be repaired? Thank you.

5/31 17:01 

After a few hours, I've tried to create a new map and finished the mission again, and it works normally. Until now, my original map still doesn't show the sticker. I hope I can collect them all! Hope you can help me to fix the problem a bit faster. Thanks for your help.