There's a lot of frustration with various things Fleck, Sanford, and Morgan did and have done the past couple games.
For me, the worst one of all has been going on for two years - the incessant checking with the sideline. It kills tempo and momentum and makes the Gophers even slower to catch up in games. They seem unable to adjust out of it, no matter the situation. It's led to many delay or near-delay penalties. There's no evidence it improves performance at all. Tanner did much better without it in 2019. It's ugly to watch as a fan.
I doubt it's Tanner's idea, and it started when Sanford got here, so I'm pinning it on him.