This was not the case before rev.6367.
Note that the callstack above is just a random break, those functions are not compulsory bugged.
Somewhere inbetween those versions something went wrong.

Edit: loading sector inventory with 250 items in rev 6394 takes 14 seconds, in rev 6367 it takes 9 seconds. Both using debug versions with debugging on, no breakpoints.
Edit2: its caused by Bobby Ray's shippment. If there is one arrived but not yet opened this increases the loading time of any sector inventory.