It can restrict movement, ventilation or door access, depending on the installation. Clearances must follow the specific cooker instructions.
What the observation means
A recently added trim or replacement worktop may alter a previously workable arrangement. The fact that the cooker can still heat does not establish that the installation remains suitable.
A useful next step
Describe any recent work and visible contact without pulling the cooker out. Obtain appropriate installation advice where clearances are uncertain. Do not trim the appliance casing, block gaps with sealant or operate it against materials showing heat damage.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.