Every test goes through a verification process following a provisional pass. That's why the results on exam day are just provisional. Among other items, I know the review includes checking for patterns of answers that might indicate a problematic test result.
Please understand that I'm not saying you did or didn't do anything. Rather, something about your test tripped a review flag. That's all. And the review can take a while. I haven't experienced it myself but I know a few who have and it just takes longer to get the final pass. It can take quit a bit longer.
Advice is to be patient. There isn't a lot of individual feedback, granted, but you will get a final answer in time.