Perhaps investors have misread the ex-dividend date as 26/09 rather than 26/08? The current price drop may suggest so. Either that or news is coming out that we don't know about.
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
AN1 CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch