Why "__typename"changed in production? (serverless)

[wavesrcool]

All of the "__typename" attributes of ObjectType() and InputType() classes are being changed when run in production only. We are using SST (serverless-stack).

This is what we see through introspection at our endpoint when run in stage 'dev':

type Mutation {
  getWebPaths(lambda: getWebPaths_e!): getWebPaths_a!
  getWebLogin(lambda: getWebLogin_e!): getWebLogin_a!
  runLogin(lambda: runLogin_e!): runLogin_a!
}

And this is what we see through introspection at our endpoint when run in stage 'prod':

type Mutation {
  getWebPaths(lambda: Ph!): Q4!
  getWebLogin(lambda: Lh!): K4!
  runLogin(lambda: Tp!): Op!
}

It would be most helpful to gain an understanding of why these "__typename" attributes are being transcribed— only when the node environment is set at production — and how they can be preserved.

Code:

lambda.ts

import { ApolloServer } from 'apollo-server-lambda'
import { APIGatewayEvent, Context } from 'aws-lambda'
import { buildSchemaSync } from 'type-graphql'
import getWebLogin from './graph/primary/getWebLogin.resolver'
import getWebPaths from './graph/primary/getWebPaths.resolver'
import runLogin from './graph/primary/runLogin.resolver'
import { TypeMesh } from './lambda.context'

const server = new ApolloServer({
  schema: buildSchemaSync({
    resolvers: [getWebPaths, getWebLogin, runLogin],
    scalarsMap: [],
    validate: true,
  }),

  playground: true, 
  introspection: true,

  context: async ({
    context,
    event,
  }: {
    event: APIGatewayEvent
    context: Context
  }): Promise<TypeMesh> => {
    context.callbackWaitsForEmptyEventLoop = false

    return {
      event,
      context,
    }
  },
})

export const handler = server.createHandler({
  cors: {
    origin: '*',
    credentials: true,
  },
})

types.ts (example class declaration)

...

@ObjectType()
export class getWebPaths_a {
  @Field(() => TypesGlobalMessage, { nullable: true })
  message!: TypesGlobalMessage

  @Field(() => Boolean)
  pass!: boolean

  @Field(() => [WebPathObject], { nullable: true })
  paths?: WebPathObject[]
}

...

package.json

    "@serverless-stack/cli": "0.54.4",
    "@serverless-stack/resources": "0.54.4",
    "apollo-server-lambda": "^2.21.1",
    "type-graphql": "^1.1.1",
    "reflect-metadata": "^0.1.13",

[MichalLytek]

Disable JS minification that mangles class names