Hello,
Honestly, I am not aware of any 100% perfect solution which can stop occurrences of such events in future. The note 174877 is the only one which is helpful here.
Please note that when the inspection lot system status is SPST, that means stock posting has started, but not completed yet. That will mean, there are some inconsistency at stock level in MM and QM level. So, at times the note 48815 is also helpful, but that will only adjust the stock level appropriately, but the system status will still be same.
May be you can open a message with SAP itself, so that they can help you further. Else, please wait for further expert comments.
Thanks,
Arijit