Anyone else knew this problem?

K2PLUS COMBO
0.4mm nozzle standard setting preset
Chamber Temperature 30 degrees Celsius
Bed Temperature 50 degrees
Nozzle Temperature 220

Hyper PLA (Creality)

Top layer was not flat.
The middle of the top is usually slightly dented.

And the last point where the nozzle leaves the seat is a slightly raised tail like the cream end of an ice cream cone.

The left side has an infill value of 20%, and the right side has an infill value of 15%
The left side is charged 20%, the right side is charged 15%
The right side printed it out first
The left side is later printed.

And yet both are slightly dented.
The infill value is 15 per cent more bent.

Is this a chamber temperature problem or filament moisture problem?

The outside humidity is 60-70% when it is high.
Humidity in CFS is 32-38%

  1. Layer height?
  2. Number of top shell layers?

Thanks, your comment.

Layer height is 0.2mm
Top shell layers is 4

Increase top shell layers number to 5 or 6 and use ironing for perfect top side.