Your threading issues get me so curious! You'll need to start sending your projects(s) into @Fox or @support so they can dissect the code to find the cause of these effects bud.
If I am running a script and one thread fails, the data used for it will disappear from the source and I cannot see which one has to be reused.
There is no way to know which data was taken, 'cause the thread had deleted all things used before. But u could log data used before the thread will be crashed.