Dont make any changes to your Tardis as you will probably lose them. Several chunks have disappeared from the tardis world, restored to an earlier version and tye are still missing, soon as I download the backup I'll try restoring from the 7th May now.
Other worlds are ok.
UPDATE:
Seems to ok now that the Tardis world is restored to 7th May. No more chunk saving errors.
GM2K Edit: We actually restored it to the 9th of May. Still no more chunk saving errors though so good news.
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