I checked with our print-process guys and combined other tips from the thread—what you’re seeing looks like Pillowing defect. The core idea is to use the process of elimination:
1.First-layer issues
(1) Filament gone bad? Re-print the same file with official PLA and compare.
(2) For third-party filament, run a one-off flow-calibration (tick the box before sending the job). If the result improves, save that flow value directly in the filament profile so it sticks with the spool.
2.Check and adjust top-surface settings:
（1）Increase top layers (try 3–5) and switch internal top infill to rectilinear.
（2）Lower top-layer speed slightly.
3.Your filament parameters don’t match:
（1）Third-party filament temperature is off—try raising nozzle temp (start with +10 °C; if it helps, print a temp-tower to find the sweet spot).
PS：The Z Hop is enabled by default; it’s recommended to just keep the default setting.