That's a cheap excuse to do nothing.
There's a quick and simple solution to the problem that is well within their ability to do and that they certainly have the technology for.
Your response shows me that people aren't seeing the bigger issue so let me phrase the problem in a different way.
I've put nearly a week worth of effort into an activity and received zero rewards. The activity is one of the most important activities in the game which provides a large payout of resources that further advance game progression. And my account is being punished due to someone else's error, not my own.
This is a quality of life issue in regards to reward distribution that affects the entire player base and shouldn't be pushed off by an empty reason to not take action. It's lazy.