Variant BOM unable to explode in Sales Order

Hello Experts,

Good Morning,

I am facing an Issue in Variant BOM which is not exploding in Sales Order.

I have created the BOM Master. The Header BOM and the components are configuration material with Item Category Group 4. Refer the BOM master snap shot,

I have also run CU50 to check the consistency of the same. The BOM is exploding and it is consistent. Refer the snap shot.

But when I am crreating the Sales Order, the BOM is not getting explode and giving below message for all the components.