I can confirm some of your inconsistencies however I still feel that the bigger problem is the delay when coming back from map view. It looks like we might be dealing with two separate issues. I'll outline my findings below:

WEAPON DOWN

Position before map view: Standing
Position after map view: Slight crouch with hand extended

State of Weapon: Down * any movement and position returns to standing

Position before map view: Crouch
Position after map view: Crouch

State of Weapon: Down

Prone n/a

SCOPE UP

Position before map view: Standing
Position after map view: Standing

State of Scope: Up

Position before map view: Crouch
Position after map view: Crouch with hand extended

State of Scope: Down * any movement and scope returns to up state

Position before map view: Prone
Position after map view: Prone

State of Scope: Up

DELAY WHEN RETURNING FROM MAP VIEW: Always

I don't seem to have the weapon issue. Any movement after coming out of the map brings the weapon to its previous state. I do think the 1-2 sec. delay is a bug though. Unless they want to have a map folding animation, but you should still be able to interrupt the map fold to draw your weapon.