Heat or an unsuitable cleaning method may have distorted it, or it may have been returned to the wrong position. Check the model's fitting and care instructions before applying force.
What the observation tells you
A drawer can look almost normal while a small change prevents its front seating. Forcing it can damage runners or keep the door ajar. Not every removable plastic part is dishwasher safe.
A useful next step
Compare its intended position and visible shape while unloaded. If it is distorted or cracked, obtain a compatible replacement. Do not heat it again or trim edges in an attempt to restore the fit.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.