In Tetris Effect's new multiplayer mode, Connected, 3 players work together to take down an AI-controlled Tetris board. After the players clear enough lines, they enter the Zone, where all existing blocks cascade down, and players combine across all 3 boards to clear lines. During this Zone section, there are times when blocks will continue to cascade, and I cannot figure out why. It is not immediate (ie. you drop a tetromino in a bad spot, with open space below it, the blocks do not cascade), and I can't accurately reproduce the cascade action.
So, what causes blocks to cascade at times during the Zone in the Connected multiplayer mode?