What's behind Jasprit Bumrah's dip in form?

The opinion that Virat Kohli and others have voiced, that he is the best all-format bowler in the world, isn't unjustified.ALSO READ: Bumrah, Shami, and the junoon that keeps them goingBumrah is lethal in all three phases: he is economical and a wicket-taker with the new ball in the powerplay overs, he bowls in the middle overs and breaks partnerships, and he is lethal with the old ball in the death overs.He has no evident weakness. Also, a dry spell for a batsman is easier to define compared to a lean patch for a bowler, for all good balls don't get wickets - the other side of which is that you're allowed to be patchy a few times in a game.To be fair to Bumrah, this is the first time in his short but illustrious career that he has gone through a lean phase. White-ball cricket isn't about wicket preservation but about scoring runs, and if a long dry spell is forced upon you, you go hard at anything you think is hittable.ALSO READ: Deadly and unique - the Bumrah impactWhile Bumrah took a lot of wickets with length balls, forcing batsmen into shots, he also took quite a few with the slightly full ones that came in to dismiss the batsman bowled or lbw, or went away, taking the edge.