Auto TO not working for few Posting change scenarios

Folks,

We have Auto TO set up for posting changes.

So if we did 343 or 344; the corresponding TO is created and confirmed.

All works good; till

A.) We have blocked stock say two units (same batch) in two different storage bins for a storage type say ACR.

Now we create a PCN for single unit (instead of two; in which case it works good);

It appears that the system cannot 'locate' the source storage bin; since it has a 'choice' of two bins for the same batch.

This is creating issues at our end.

If you go to LU04; you do see a corresponding entry and then create; confirm a TO.

SAP documentation says to do manually; or that was my understanding.

Creating Transfer Orders Immediately at the IM Posting - Warehouse Management System (WMS) - SAP Library

Have gone through note # 566090 (seems old for the current release we are in.).

What are the options in taking care of these scenarios?

Thanks.