As we know that this month's global mission got completed within 6Hrs so a lot of players including me didn't get a chance to give their input to claim the mission.

 

But now I just used 1e in gym for a different test, and it suddenly let me claim the mission.

I think it's a bug.

Edit:In other global missions, I remember that the user needs at least 1 contribution to claim the reward after completion. But here it completed before I contributed anything, still I get to claim it by giving a contribution which technically isn't a contribution.