Originally it was the auditors Grant Thornton who kicked things...

Originally it was the auditors Grant Thornton who kicked things off. They were unhappy with the nature of the loan and the value of diamonds MED said it held.

They expressed this unhappiness in the statutory accounts for 2017 and 2018.

Maybe it was the fact that MED was late with submission of the statutory accounts in 2018 that caused the ASX to read the auditors' unhappiness. See the ASX announcement of 25 Oct 2018.