Radio buttons changing text in another field

Hello! Thank you for your help:
I was wanting in this page to have different default messages for each topic selected in “Pick A Topic”. Now for some reason the defaults aren’t changing, but worse than that, if someone starts writing something then they change the “topic”, everything they wrote disappears.
It’s more important that they don’t lose what they wrote, but at this point I’m failing in both issues!

<div class=”contact__block-wr”>
<div class=”contact__block half”>
<h3 class=”contact__block-title”>1. Input Your Information</h3>
[text* first-name placeholder “First Name*”]
[text* Last-name placeholder “Last Name*”]
[email* contact-email placeholder “Email*”]
[tel* phone placeholder “Phone Number*”]
</div>

<div class=”contact__block half”>
<h3 class=”contact__block-title”>2. Pick a Topic</h3>
<span class=”contact__block-text”>We use this to figure out to whom this email should be directed. Thank you!</span>

[radio topic use_label_element default:1 “Parties/Events” “Restaurant/Menu ” “Comments/Praise” “Other” ]

<div class=”contact__link-block”>
<div class=”contact__link-item first”> or see Private & Semi Private Events </div>
<div class=”contact__link-item”> or see Current Menu or Reservations</div>
</div>

<span class=”contact__block-text title”>For Musicians</span>
<span class=”contact__block-text”>If you have a question regarding playing at 210, see our Get Booked at 210! page.</span>
</div>
</div>

<div class=”contact__block full”>
<h3 class=”contact__block-title”>3. Tell us/Ask us/Share* (be sure to pick a topic before writing here)</h3>

[textarea* comment 160x placeholder “Tell us what you’re thinking about/Ask us anything/Praise us or critique us, but bring it on–we want to know!” ]

<div class=”contact__block full”>
<h3 class=”contact__block-title change” data-1=”Party/Event Inquiry or Comment” data-2=”Restaurant/menu comments” data-4=”Other” data-3=”Comments/Praise”>3. Party/Event Inquiry or Comment</h3>
[textarea comment class:textarea__change class:events__textarea class:ui-id-1 class:active placeholder “” ]
[textarea comment class:textarea__change class:menu__textarea class:ui-id-2 placeholder “For reservations use the link found above or in the menu bar.”]
[textarea comment class:textarea__change class:music__textarea class:ui-id-4 placeholder “If this is a band or musician seeking to be booked at 210, PLEASE do not use this form. Go to the link https://173.247.246.158/~twotenrestaurant/band-sound-info/ and fill in your information.”]
[textarea comment class:textarea__change class:price__textarea class:ui-id-3 placeholder “We LOVE praise, but we welcome all input”]

[recaptcha class:g-recaptcha]

<button class=”contact__submit-button”>submit</button>
</div>

The page I need help with: [log in to see the link]