Understanding the unrealised CGT report

I’m trying to understand an apparent discrepancy in the unrealised CGT report.

I have a holding with a cost base of $2.20 per share.

However, in the unrealised CGT report, the cost base shows as zero.

This is only the case for this particular holding, which makes we wonder if there is some aspect of the holding causing the discrepancy. The investment type is ‘trust units’ – could that be the reason?