Nestjs Dependency Injection - Inject service into service

I have a service which I can inject into other components without any issues.

When I try to inject that service into another service I get

Error: Nest can't resolve dependencies of the AService (?). 
Please make sure that the argument BService at index [0] is available in the AService context.

I cannot find any way to inject services into each other. Is this not supported, kind of an anti-pattern.... ?

And if so, how to handle a service with functionality I want to be available in all of my app in several components and services?

Code as follows:

b.module.ts

import { Module } from '@nestjs/common';
import { BService } from './b.service';

@Module({
  imports: [],
  exports: [bService],
  providers: [bService]
})
export class bModule { }

b.service.ts

import { Injectable } from '@nestjs/common';

@Injectable()
export class BService {
  someFunc();
}

a.module.ts

import { Module } from '@nestjs/common';
import { SensorsService } from './a.service';
import { SensorsController } from './a.controller';
import { BModule } from '../shared/b.module';

@Module({
  imports: [BModule],
  providers: [AService],
  controllers: [AController],
  exports: []
})
export class AModule { 

}

a.service.ts - which should be able to use b.service

import { Injectable } from '@nestjs/common';
import { BService } from '../shared/b.service';

@Injectable()
export class AService {
  constructor(
    private bService: BService
  ) {}

  someOtherFunc() {}
}