Direct Delivery Workbench doesn't work as expected

We had a CU12 done on all  our instances and after this, the Direct Delivery Workbench doesn't seem to work as expected. 

After creating a sales order on Drop ship products, the S/O would show up on the Direct Delivery workbench (MCRDROPSHIP) automatically. It doesn't anymore. 

So some things I find odd is that

while creating the S/O the direct delivery checkbox is Ticked, but when I process the sales order, and go back to verify it, the field isn't checked anymore.

And also, in the header section of sales Order creation, in the  sales Order tab, under New group, The Direct Delivery and Purchase Order buttons are disabled. 

Any Ideas as to what might be going on?