spring-cloud-kubernetes: Cannot load multiple mounted configmap with multiple application.yaml

I would like to use multiple mounted config maps and according to the source code KubernetesPropertySource.java, same key application.yaml will be overwritten in the result HashMap which causes that multiple config maps cannot be loaded at the same time and only the last mounted configmap that has the same key can be loaded successfully. Need a help since I am not sure if this is the design or it is a bug. Also I tried consuming configmap from API which works.

Configuration files:

# configmap
apiVersion: v1
kind: ConfigMap
metadata:
  name: configmap-spring-1
  namespace: {{ .Release.Namespace }}
data:
  application.yaml: |-
    deployment:
      type: cloud
      name: beta

# configmap
apiVersion: v1
kind: ConfigMap
metadata:
  name: configmap-spring-2
  namespace: {{ .Release.Namespace }}
data:
  application.yaml: |-
{{ .Files.Get "application.yaml" | indent 4 }}
    ---
    spring.profiles: {{ .Values.springProfile }}
{{ .Files.Get (printf "application-%s.yaml" .Values.springProfile) | indent 4 }}

# values.yaml
springProperties:
  spring:
    cloud:
      kubernetes:
        config:
          enableApi: false
          paths:
            - "/home/configmaps"
        reload:
          enabled: true