Look, it seems downright stupid to express a worry about a player who is the league's leading goalscorer, clear of the pack by three goals (and no Kane to chase him any more). But you can't help feeling that he is getting chances that he would have been simply gobbling up like an ogre gobbling up children last season.
But the most important thing, by far, is that he is getting those chances. In other words, his instinct for where to be is in no way impaired. You could argue that he is actually getting into clear goalscoring positions more than he was a year ago, and that's why it's so noticeable when he doesn't put them away. It's also worth pointing that in the last two games, especially, the keeper has at moments in the game played a blinder in stopping him from scoring. I seem to remember that Fulham's keeper wasn't too bad, either. That goal that he bloody nearly scored against the Hammers would have been comparable to the Dortmund one, if Areola hadn't parried it so brilliantly.
There is no major problem. It'll click. He must stay hungry, and angry.