run with precedent cells has inconsistent behavior

[amunger]

Testing #14550

I had 2 cells:

def func2():
    print(3)

func2()

1. run with precedent cells on the second cell initially only ran the second cell.
2. after adding x=1 to the first and print(x) to the second run with precedent cells was a noop - no cells ran, no jupyter logs.
3. After performing a couple more actions, run with precedent cells now runs both cells, even if I revert to the original contents, and reload the window

[amunger]

This does not consistently repro

[amunger]

got a repro by deleting the precedent cell -> noop
undo to bring the cell back -> still noop

[rebornix]

run with precedent cells on the second cell initially only ran the second cell.

I think this happens if the first cell is never executed, I have a fix for this #14549 but didn't succeed releasing it yet.