We have been having this issue since about July last year and I'm not surprised that MYOB has still not been able to produce a solution to the problem, their tech support is atrocious. I've been a MYOB user for 30 years and they are getting worse each year.
Responses are useless, irrelevant and sometimes just downright ridiculous (honestly, the last solution I read here was to resend them.... seriously? You think we haven't already done that a zillion times already??) An inept response with an inefficient, time consuming and costly solution.
If you're going to increase your subscription prices MYOB, how about offering some real tech support while you're at it.