Hi Ernest,
Yes, this is what I wanted. The signal will have to be zoomed, but it appears that the area of interest is in this oval below.
The I_A current has reached 100%, so the I_B current should be 0%. At 20V/division, it is difficult to determine the BEMF. It appears the stall should have asserted due to B+, but did not.
Zooming into this area and the comparing it with the A+ BEMF that did assert should help determine why it did not.