In Arnhem earlier this season, the FC Utrecht supporters misbehaved in the same way and the action of the Vitesse supporters can be seen as a kind of revenge action. FC Utrecht supporters threw flares that were thrown in the box back into the full Vitesse box. After referee Allard Lindhout had already temporarily stopped the game, he directed both teams inside when the fireworks continued to be thrown.
The fact that things immediately go wrong again in the first round in the old situation after the months-long period without supporters in the stands will increase the call for games to be played without an audience.