Hi Domnick,
I tested in our internal system, and this is the system standard behavior.
By the way, for old T-code ME51, ME52, ME53, they have already end of support. I suggest you consider use new T-code ME51N, ME52N, ME53N instead.
Please refer to following SAP Note for more detailed information.
#1803189 - FAQ: End of Support of ME21, ME51, and BAPI_PO_CREATE etc.
Hope this confirmation and information can clear your concern.
Thanks & Best regards
Allen