thrift response error: unknown field type 108 using thrift_proxy

Title: thrift response error: unknown field type 108 using thrift_proxy

Description: We have a service with Thrift RPC interface. When using thrift_proxy while most requests were successful. There were numerous errors with thrift response error: unknown field type 108 and the field type number has several possible values such as 108, 111, -105 etc. There were no such errors when connecting to the service directly.

Config:

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address:
      protocol: TCP
      address: 0.0.0.0
      port_value: 9901
static_resources:
  listeners:
  - address:
      socket_address:
        protocol: TCP
        address: 0.0.0.0
        port_value: 12000
    filter_chains:
    - filters:
      - name: envoy.filters.network.thrift_proxy
        config:
          transport: AUTO_TRANSPORT
          protocol: BINARY
          stat_prefix: 'thrift_svc'
          thrift_filters:
          - name: envoy.filters.thrift.router
          route_config:
            routes:
            - match:
                method_name: ''
              route:
                cluster: thrift_svc
  clusters:
  - name: thrift_svc
    connect_timeout: 0.25s
    type: LOGICAL_DNS
    lb_policy: ROUND_ROBIN
    extension_protocol_options:
      envoy.filters.network.thrift_proxy:
        transport: FRAMED
        protocol: TWITTER
    health_checks:
    - interval: 10s
      timeout: 3s
      unhealthy_threshold: 2
      healthy_threshold: 1
      tcp_health_check: {}
    load_assignment:
      cluster_name: thrift_svc
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 'thrift-svc'
                port_value: 5908

Logs:

[2019-07-20 20:09:48.590][11][error][thrift] [source/extensions/filters/network/thrift_proxy/conn_manager.cc:653] [C11] thrift response error: unknown field type 108
[2019-07-20 20:11:42.505][16][error][thrift] [source/extensions/filters/network/thrift_proxy/conn_manager.cc:653] [C64] thrift response error: unknown field type 108
[2019-07-20 20:11:44.725][16][error][thrift] [source/extensions/filters/network/thrift_proxy/conn_manager.cc:653] [C66] thrift response error: unknown field type 111
[2019-07-20 20:11:56.267][16][error][thrift] [source/extensions/filters/network/thrift_proxy/conn_manager.cc:653] [C76] thrift response error: unknown field type 111
[2019-07-20 20:16:51.869][13][error][thrift] [source/extensions/filters/network/thrift_proxy/conn_manager.cc:653] [C116] thrift response error: unknown field type 108