This glitch needs to be rectified ASAP Myob.
You have no idea how inconvenient this has become.
Going in and out of Security Lock Period is not ideal once a BAS has been generated - there's too much chance of an Invoice/Transaction being possibly changed - and this could happen quite easily by accident.
We are required to reprint past dated Invoices due to our business type as they provide the exact list of parts required for Services etc. To not be able to do this now as we always have, is VERY inconvenient.
Email outstanding Invoices is no longer possible as mentioned in several other comments, without disabling the locked period.
This needs to be urgently looked into please.
We can't stress enough how important it is to still be able to print / or email Invoices prior to the Locked Period Date.