Section headers - Migration from ion-virtual-scroll to cdk-virtual-scroll

Hi there,
we are trying to switch from ion-virtual-scroll to cdk-virtual-scroll as described in the announcements for Ionic V6. This also works, but we have a big problem which we cannot solve so far.
With the ion-virtual-scroll it was possible to generate section headers via the headerFN function and then display them as *virtualHeader in the von-virtual-scroll.
Unfortunately, we cannot implement this function in the cdk-virtual-scroll.
Is there a possibility to create this?

Many thanks


I am facing this problem too. But I bet this is due to your source is from observable. Try different source of data