Jack
I presume you mean lap-by-lap data for races. It's not lost, we just opted not to transfer it into the new system yet. It will be restored over the coming days/weeks in full. It was a low priority to get that data across first, as top priority was getting the core systems online and running better.
Seems the data is not lost and might be back if it goes to plan. With the exception of a few races lately that ran during the time of transition and thus didn't log to any system, both old and new, as was mentioned in another post.