Tag applied, ball dropped - Obstruction called

[rafking]

NSA
Catcher set for a good block at the plate. Ball arrives 5 feet prior to runner getting there and tag is presented. Ball is knocked out during the play and falls within reaching distance of catcher. Runner's slide hits catcher's foot and runner is halted 6 inches from reaching plate.

Runner make no attempt to touch plate. Catcher picks up the ball and tags runner.

Ump calls her safe for obstruction due to new rule.

Thoughts?