Same thing in Version 1.5.4a, Sierra ship's ability bar goes off the screen, and ability can't be used, in past version its was working fine. Also another thing with Sierra core itself, its build in in Cruiser, but when you stash ship the core remains in officer list, and you can add it as officer into another ship.
But overall I like changes with this quest, first of all its good what station guard is reduced, in 0.9.1 version it was guarded by several REDACTED capitals, not to mention smaller ships like cruisers and such, because when you can destroy that force you usually powerful enough and don't need that cruiser, and I tried in past version, Sierra's cruiser become much better that in past version, although sadly its got broken.