I've never heard of it berfore, but the excellent CBC radio program 'Day 6' did a segment about it yesterday.
Bluey is a beloved animated kids show about a family of four dogs and their daily lives. The show is celebrated by parents and it has spawned multiple Facebook groups dedicated to Bluey memes. But recently, the biggest of those groups has been consumed by the culture wars and sparked a bitter fight that seems very much at odds with the spirit of the show. Katie Notopoulos, a correspondent at Business Insider who writes about technology and internet culture, explains how it happened.
https://www.cbc.ca/listen/live-radio/1-14-day-6/clip/16020729-even-bluey-immune-culture-wars