This been happening with many speed feats and just normal feats. This exact thim happened with FOS3 Speed feat for a friend. And the Fire trap feat from the Ruined Cathedral duo. I think the best way to report this kind of stuff is in the issue tracker since i'm not sure how much they look at the arkham asylum now.
Same problem here being experienced by a league member. Ran it with him 4 times. We've done the standard A51 T1 raid twice, aswell as two runs of the easier one you unlock at <30. All times, we completed it in around 11 or 12 mins. Zero times he has received the feat. To clarify, i have it, and did it ages ago, aswell as all the other speed feats.
Same here but they give no **** about it I guess because it has been bugged for a long time and plus its confirmed in bug tracker... -.-