MongoServerError: location object expected, location array not in correct format

I’ve built a nestjs application and in one of the schemas I defined a location field as follows:

the location field

  @Prop({ type: LocationSchema, required: isRequired, index: '2dsphere' })
  public location?: Location;

the LocationShcema

@Schema()
export class Location {
  @Prop({ type: String, required: true })
  public type = 'Point';

  @Prop({ type: [Number, Number], required: true })
  public coordinates: [number, number];
}

export const LocationSchema = SchemaFactory.createForClass(Location);

In production when requesting creation of a document it gives me this error:

MongoServerError: location object expected, location array not in correct format

I have two questions

1. why does this error show up?
2. why does it occur only in production?