Selection by window/crossing window skips prompt for opposite corner

#1
ICAD newbie here, ACAD oldie.

I'm trying to move multiple objects by crossing window selection, but ICAD jumps past "Opposite corner: " prompt.
Here's the command trail:
Command:
_MOVE
[FILter]/<Select entities to move>: cr
First corner of crossing window: 2.640,14.727,0.000
Opposite corner: 2.640,14.727,0.000 <= this is autofilled with first corner coords and entered
[FILter]/<Select entities to move>: <= so no entities are selected

Is there a setvar for picking multiple entities? What am I doing wrong?