I agree. Pukki looked up before crossing the ball to the free player at the far post. Fair to assume if Telles had marked Dowell then Pukki would have noticed the central player was free in front of our goal. The first goal is down to Elanga not following Pukki and Pogba for not tracking Pukki once it is clear Elanga hasn't noticed what happened.
Even the 2nd goal looked to me to be more Lindelof than Telles.
Having said all that, it is clear now that Telles is not a good defender. His value is in terms of assists and dangerous crosses. From a distance it seems like our scouts got carried away by Bruno Fernandes' success here and thought anyone who looked good in Portugal would be worth the risk.