nodejs-firestore: GRPC related crash when committing batch updates

Environment details

• OS: OS: Mac OS 10.15 Beta (19A573a)
• Node.js version: v12.10.0
• npm version: 6.10.3
• @google-cloud/firestore version: 3.0.0

Steps to reproduce

1. Create several batch updates and commit them all at once:

const batches =[b1, b2, b3, b4, b5];
await Promise.all(batches.map(async (b) => b.commit()));

I then get these errors (sometimes but not always)