Australia Post linked account not uploading tracking numbers

Only since 3 days ago, the the tracking numbers have stopped automatically loading from my linked Australia Postage account.  They buyer details still download into the Australia Post portal so I can create labels, but the tracking number won't automatically load back into the eBay portal for the buyer.   I have had to start manually inserting them.  I have tried disconnecting my eBay account from the Austalia Post account, then reconnecting it, but it is still only working in one direction.  Any ideas what might be wrong?  Thanks.