kubernetes: Values from secret yaml are broken in node js container after gpg decryption

I am new to Kubernetes. I have a Kubernetes secret yaml file:

apiVersion: v1
kind: Secret
metadata:
  name: my-secret
type: Opaque
data:
  API_KEY: 123409uhttt
  SECRET_KEY: yu676jfjehfuehfu02

that I have encoded using gpg encryption:

 gpg -a --symmetric --cipher-algo AES256 -o "secrets.yaml.gpg" "secrets.yaml"

and decrypting it in github action's workflow like this:

gpg -q --batch --yes --decrypt --passphrase=$GPG_SECRET my/location/to/secrets.yaml.gpg | kubectl apply -n $NAMESPACE -f -

When I run:

kubectl get secret my-secret -n my-namespace -o yaml

I get yaml showing correct values set for API_KEY and SECRET_KEY, like this:

apiVersion: v1
data:
  API_KEY: 123409uhttt
  SECRET_KEY: yu676jfjehfuehfu02
kind: Secret
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","data":{"API_KEY":"123409uhttt","SECRET_KEY":"yu676jfjehfuehfu02"},"kind":"Secret","metadata":{"annotations":{},"name":"my-secret","namespace":"my-namespace"},"type":"Opaque"}
  creationTimestamp: "2021-07-12T23:28:56Z"
  managedFields:
  - apiVersion: v1
    fieldsType: FieldsV1
    fieldsV1:
      f:data:
        .: {}
        f:API_KEY: {}
        f:SECRET_KEY: {}
      f:metadata:
        f:annotations:
          .: {}
          f:kubectl.kubernetes.io/last-applied-configuration: {}
      f:type: {}
    manager: kubectl-client-side-apply
    operation: Update
    time: "2021-07-10T23:28:56Z"
  name: my-secret
  namespace: my-namespace
  resourceVersion: "29813715"
  uid: 89a34b6d-914eded509
type: Opaque

But when application requests using SECRET_KEY and API_KEY, it shows these values in broken encoding. I get these values printed When I log them:

Api_Key -  ᶹ��4yַӭ�ӯu�ï¿8
Secret_Key - �V�s��Û[ï¶×¿zoï½9s��{ï¿½ï¿ 

When I don't use Api_Key and Secret_Key from secrets.yaml (as a hardcoded value in application) then it works as expected.

I need help to access secret data (Api_Key and Secret_Key) with correct values in container running node js application.