Firstly, thanks for all the reports on this issue, especially everyone's persistence!
We have found a small issue when rebroadcasting MLAT that is causing this problem, unrelated to the data itself, and even when Mode-S/3D is disabled in PilotAware.
So we are going to disable MLAT rebroadcast for a short time, whilst we rollout a fix to the network.
Thx
Lee