Chime TTS - Play audio before/after TTS audio lag free

Thank you for building this. I can get it to work with my Sonos speakers alone, but not with my Alexa (Echo) speakers. What I want is to run this on both Sonos and Echo speakers at the same time. Below is a sample automation to announce when the washing machine is done. I took the Chime TTS YAML for Alexa directly from the GitHub here. However, this gives me the following error message when I try to save the automation:

Message malformed: extra keys not allowed @ data['sequence']

Here is the automation that will not save:

alias: Laundry Washing Machine Notification
description: >-
  Send a push notification to phones and announce on Echo and Sonos devices if
  it is not between 1 and 3:30 pm on the weekend or 7:30 pm and 7:00 am any day
  when washing machine current consumption is above 5 watts for 1 min 30 sec and
  then falls below 5 watts for 1 min 30 sec
trigger:
  - platform: numeric_state
    entity_id: sensor.washing_machine_current_consumption
    for:
      hours: 0
      minutes: 1
      seconds: 30
    above: 5
condition:
  - condition: state
    entity_id: input_boolean.kill_switch
    state: "off"
  - condition: state
    entity_id: input_boolean.washing_machine_override
    state: "off"
action:
  - wait_for_trigger:
      - platform: numeric_state
        entity_id: sensor.washing_machine_current_consumption
        for:
          hours: 0
          minutes: 1
          seconds: 30
        below: 5
  - service: notify.mobile_app_michaels_iphone
    data:
      message: >-
        Washing machine is done at {{as_timestamp
        (states.sensor.washing_machine_current_consumption.last_changed) |
        timestamp_custom("%-I:%M %p (%m-%d-%y)")}}
      data:
        clickAction: /lovelace-minimalist-2/laundry
        url: /lovelace-minimalist-2/laundry
      title: Laundry
  - service: notify.mobile_app_ashleys_iphone
    data:
      message: >-
        Washing machine is done at {{as_timestamp
        (states.sensor.washing_machine_current_consumption.last_changed) |
        timestamp_custom("%-I:%M %p (%m-%d-%y)")}}
      data:
        clickAction: /lovelace-minimalist-2/laundry
        url: /lovelace-minimalist-2/laundry
      title: Laundry
  - condition: or
    conditions:
      - condition: not
        conditions:
          - condition: time
            after: "13:00:00"
            before: "15:30:00"
            weekday:
              - sun
              - sat
          - condition: time
            after: "19:30:00"
            before: "07:00:00"
            weekday:
              - sun
              - mon
              - tue
              - wed
              - thu
              - fri
              - sat
sequence:
  - service: chime_tts.say_url
    response_variable: chime_tts
    data:
      message: The washing machine is done
      tts_platform: google_translate
      audio_conversion: Alexa
      language: en
      chime_path: custom_chime_path_1
      tld: com
  - service: notify.alexa_media
    data:
      message: <audio src="{{chime_tts.url}}"/>
      target:
        - media_player.michael_s_echo
      data:
        type: tts
mode: single

Here is just the notification portion for a Sonos speaker that does work (my goal is to have this work for both Sonos and Alexa in the same automation):

  - service: chime_tts.say
    target:
      device_id:
        - c99b88e8d7470f54d1b33ed6f2fc607f
    data:
      chime_path: custom_chime_path_1
      end_chime_path: ""
      final_delay: 0
      tts_speed: 100
      tts_pitch: 0
      volume_level: 0.3
      tts_platform: google_translate
      message: The washing machine is done

And finally, here is the notify portion that was working across Sonos and Alexa before I installed Chime TTS:

  - service: notify.alexa_media
    data:
      message: The washing machine is done
      data:
        type: tts
      target:
        - media_player.michael_s_echo
        - media_player.michael_s_echo_dot
  - service: tts.google_translate_say
    data:
      cache: false
      message: The washing machine is done
      entity_id: media_player.basement_bedroom