Thanks for the file - it is very helpful. We may have identified a bug here that affects using marker data when generators are nested inside an A2S generator. It seems the referencing system is not working correctly. We are looking into it and hope to have a more definite answer and a fix soon.
In the meantime, a possible solution may be to nest the window into an L1S generator instead. Using generators nested inside L1S arrays appears to be unaffected by this suspected bug. I will send you your file with the style modified to illustrate.
Apologies for the inconvenience, I hope we can get this fixed quickly.
All the best,