Stockable item and non stockable item should invoice at once

Hi folks,

I wanted to address an issue we are facing with the invoicing process for our recent order. We have two items in place: Line 1, which is a stockable item, and Line 2, which is a non-stockable item. While we wish to invoice both items together, we’ve noticed that the system is processing the non-stockable item immediately, but the stockable item remains in 'awaiting shipping' status.

How we can invoice both items at once? I praposed to use manual hold but business expecting systematic process to avoid manual intervention.