Did Runner Interfere So Teammate Could Score?

Chicago trapped Colorado batter-runner Yanquiel Fernández in a rundown as Rockies lead baserunner Warming Bernabel attempted to score. As Cubs second baseman Nico Hoerner received a throw from Michael Busch, BR Fernández collided with him, 2B Umpire Alan Porter ruling an out on the tag, but not interference, the delay from the collision allowing R1 Bernabel additional time to score, with a slide into home plate just ahead of the tag attempt.

Should this have been ruled interference or, because Fernández hadn't yet been tagged until after the initial collision (although he was tagged while being shoved away by Hoerner), does the relevant rule pertaining to a retired runner not apply? For reference that rule is Official Baseball Rule 6.01(a)(5): "Any batter or runner who has just been put out, or any runner who has just scored, hinders or impedes any following play being made on a runner. Such runner shall be declared out for the interference of his teammate."

Video as follows:
Alternate Link: Fernández and Hoerner collide, but was it incidental contact or illegal interference?