starting production of a SU while the Armoury upgrade is still being processed results in a SU-85 showing 100% built in the Tank Hall but not leaving the factory after the conversion to SU-100 is done. basically, the production queue in the Tank Hall shows a SU and all the consequent orders in the line but freezes until we click to cancel the SU production (all the resources spent are returned; the next unit in the queue is getting built)bug or fool-tolerance?)