aws-lambda-nodejs: Socket timed out without establishing a connection

Describe the bug

I have anywhere between 20-50 nodejs lambda functions in single stack and I update their dependencies and deploy with cdk.

But lately I am not able to deploy updates. I get following error when I deploy.

current credentials could not be used to assume 'arn:aws:iam::******:role/cdk-hnb659fds-lookup-role-******-us-east-1', but are for the right account. Proceeding anyway.
(To get rid of this warning, please upgrade to bootstrap version >= 8)
current credentials could not be used to assume 'arn:aws:iam::******:role/cdk-hnb659fds-file-publishing-role-******-us-east-1', but are for the right account. Proceeding anyway.
current credentials could not be used to assume 'arn:aws:iam::******:role/cdk-hnb659fds-file-publishing-role-******-us-east-1', but are for the right account. Proceeding anyway.
[9%] fail: Socket timed out without establishing a connection
[18%] fail: Socket timed out without establishing a connection

I keep trying again and again and sometimes it goes through and most of the time it doesn’t work. Only stack with lower number of lambda functions sometimes gets deployed. But stack with large number of lambda functions fails 100% of the time.

Expected Behavior

I expected it to deploy no matter number of lambda functions in the stack. It used to get deployed without any problem.

Current Behavior

current credentials could not be used to assume 'arn:aws:iam::******:role/cdk-hnb659fds-lookup-role-******-us-east-1', but are for the right account. Proceeding anyway.
(To get rid of this warning, please upgrade to bootstrap version >= 8)

I don’t know how to upgrade bootstrap version. I ran cdk bootstrap multiple times and it says no changes.

Reproduction Steps

const testSignUpFn = new NodejsFunction(this, 'testSignUpNodeJS', {
      runtime: Runtime.NODEJS_14_X,
      entry: `${__dirname}/../lambda-fns/sign-up/index.ts`,
      handler: 'signUp',
      architecture: Architecture.ARM_64,
      memorySize: 1024
    })

It was working before but suddenly stopped working.

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.20.0 (build 738ef49)

Framework Version

No response

Node.js Version

v16.14.2

OS

Ubuntu 20.04 on WSL 2

Language

Typescript

Language Version

~3.9.7

Other information

No response