F2 drops ball on tag while blocking plate

[DTQ_Blue]

Tourney yesterday. On play at plate, F2 gets the ball ahead of runner. She legally blocks plate, runner slides tag is made and runner's momentum causes F2 to drop the ball. F2, having gone to her knees to make the initial tag attempt is now on the ground blocking the plate with the ball easily within her reach on the ground. The runner quickly (and smartly) reaches around F2 and touches the plate just before F2 can pick up the ball and tag her. So I have "safe."

I asked my partner after the game if he thought this would be OBS if it were the other way around and F2 had tagged the runner before the touch. He said that is considered a trainwreck and would not have been OBS.

I'm not sure I agree, but would like to hear other opinions.