Is the (no longer) BR not now a retired runner interfering with a play?
OK, let's look at it this way...
a) Runners stick to their bases as ball lands on the ground (after BR & F3 collide) or
b) Ball skips off F3's glove (after BR & F3 collide) & rolls further infield, chaos ensues, R1 is able to score.
Just wanna see a new thread here