Lotto took a wrong gamble. When Jörgensen was at 8 seconds, De Lie hesitated to ride because he had teammates behind. So in theory it was beneficial for them to let the groups reunite.
In reality they couldn't reel-in Tratnik & Politt afterwards. But to let these 2nd - 3rd fiddle riders escape already was a blunder by the likes of Küng who had just managed to come back as well.
So in the end, lots of wrong tactics today.
Even Visma in the end was simply lucky. Letting the weakest rider move away in Jörgensen cleary was a tactical error as well, since he died out in front.