Bank and MYOB don't match

Hi all,

Like the title, my bank balance (which is correct) doesn't match with what MYOB thinks is there, short by about $1800.

It was all good until I received some invoice payments, it was actually correct after allocating the payments to the cent, but after a couple of days on logging back in it shows a discrepancy.

And now today another bank account shows a discrepancy also after just 1 transaction with the bank also correct.

 I know MYOB can be a bit laggy but.....

Any thoughts😒😒😒😒