SAM deploy stalls on first run, works on second.

### Description:
Several months ago we started observing failures during our service deployments. Our deploy script pulls a prebuilt container image and then runs the sam deploy command. On the first attempt to deploy to a given instance, the deployment will stall indefinitely (we have left it running for hours while debugging). When we rerun the deploy, everything is successful.

### Steps to reproduce:
Run `SAM deploy`. It will stall until you send a sigterm. Run `SAM deploy` again, it will now deploy the service without issue.

### Observed result:
At first there is nothing returned. The following is dumped after the job is terminated:

```Aborted
Sending interrupt signal to process

SAM CLI now collects telemetry to better understand customer needs.

You can OPT OUT and disable telemetry collection by setting the
environment variable SAM_CLI_TELEMETRY=0 in your shell.
Thanks for your help!

Learn More: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-telemetry.html

2022-04-12 19:49:00,757 | Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
2022-04-12 19:49:00,758 | Using config file: /home/ubuntu/workspace/MyApp Deploy Prod/apps/myapp/reporting-service/samconfig.toml, config environment: nightly
2022-04-12 19:49:00,758 | Expand command line arguments to:
2022-04-12 19:49:00,758 | --template_file=/home/ubuntu/workspace/MyApp Deploy Prod/apps/myapp/reporting-service/template.deploy.yaml --stack_name=pdfgen-nightly --image_repositories={'PdfGenFunction': 'REDACTED ECR URI'} --capabilities=('CAPABILITY_IAM',) --s3_bucket=myapp-reporting-service-deploy --s3_prefix=cmyapp-reporting-service

The push refers to repository [REDACTED ECR URI]


a49912bbd1b1: Preparing 

# I cut out ~1000 lines of similar docker push output
c4bb7b34a062: Pushing [=============> ] 134.1MB/514.5MB

a49912bbd1b1: Pushing [============================================> ] 282.9MB/318.1MB

1916928847df: Pushing [==================================> ] 72.94MB/104.6MB

713628b4c6d9: Pushing [==============> ] 118.7MB/405.7MB

c4bb7b34a062: Pushing [=============> ] 135.8MB/514.5MB

a49912bbd1b1: Pushing [============================================> ] 284MB/318.1MB

713628b4c6d9: Pushing [==============> ] 120.8MB/405.7MB
> sam deploy --template /home/ubuntu/workspace/MyApp Deploy Prod/apps/myapp/reporting-service/template.deploy.yaml --config-file /home/ubuntu/workspace/MyApp Deploy Prod/apps/myapp/reporting-service/samconfig.toml --config-env nightly --stack-name pdfgen-nightly --image-repositories PdfGenFunction=REDACTED ECR URI --region us-east-1 --capabilities CAPABILITY_IAM --no-confirm-changeset --no-fail-on-empty-changeset --debug
Failure while executing command, exit code -15
script returned exit code 241
```

### Expected result:
This issue is odd because of how repeatable it is. Deploys fail on the first attempt, succeed on the second, every time.

I expected things to work the first time.

### Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: Ubuntu server
2. `sam --version`: SAM CLI, version 1.23.0
3. AWS region: us-east-1