Rule Trivia

[Manny A]

Originally Posted by MD Longhorn

I guess it's on the umpire here to decide of BR simply made a mistake, or took 2nd based on actions that never would have occurred without the obstruction.

I don't think we need to always take into account what other runners subsequently do that they might not have done had there been no obstruction.

Suppose you started with R1 at third and R2 at second, and R2 is obstructed by F4 as she tries to go back to second on a pickoff from F2. She gets into a rundown, and in the process, R1 decides to go home as R2 safely slides under the tag going back to second. R1 is then thrown out at home. We wouldn't rule that R1 should go back to third base because, minus the obstruction, she likely would have never attempted to advance home.

I see your OP play similarly.