My boden 8 had this issue as well, got the little plate for the high E and everything is perfect. It really sucked though cause I waited almost a year for my guitar to be built and then I couldn't really play it for the first month because the high E kept breaking. The problem was fairly obvious too, I would find it easy to snap the e just by barely tightening the locking screw.
When I stop being lazy I'll post a NGD for my Boden8.
Good to know that you got it fixed.
It is definitely disappointing, because the high-E-breaking issue is older than AstralEXRS itself. One would assume that they would be careful to test for it—an obvious test like you found yourself—to immediately apply the fix, which is both trivial and readily available.
I can only guess that this is part of a new small business trying to get the logistics under control.
I'll be waiting for your NGD!