Well, it has been a known bug for some time. There were times in the past they've suspended people for performance based on bugs. The only one I know of for sure is when there was a glitch allowing people to collect AAT rewards as many times as they hit the claim button. They suspended anybody who had done it more than twice.
Now there is also the case of Barris's Zeta where they refunded everybody's mats when they fixed it.
Now they could go either way, or both, if and when they fix it, they may decide to remove raid rewards from people who were using him to solo but still refund materials too.
We can't say for sure. That's the problem with investing in bugged things. That's why I just won't zeta him.