Where the manual permits owner removal, the cap and other loose parts must return to their correct clean, dry positions. An incorrect fit can change ignition or flame behaviour.
What the observation means
Parts from neighbouring burners may look similar but differ in size. Never rearrange them while hot or while ignition is operating.
A useful next step
Follow the exact owner's reassembly diagram only. If a normal flame cannot be established, stop and seek appropriate help. Do not enlarge ports, bend an electrode or continue operating a visibly abnormal burner as a cleaning workaround.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.