I've never heard of that rule nor have I seen it in any Uno video games which, I assume, force you to play by the proper rules.
On the video games is a configurable rule, there is a rule where you can't start a game with an action card, if the first turned over card to the discard pile is an action one, you must return it to deck and select a new one. I am attaching photos of two of my rule set of physical decks, one on Spanish and other on English
Believe me, that exacly ending was a big fight on a game night pre-quarentine and still now one of my friends regrets the existence of the rule on the pamphlet😜