Keyboard problem on ankidroid and answering conserved on ankiweb

Based on what worked for this person:

While I don’t get why both would be required, perhaps you also need to set the contenteditable attribute in addition to virtualkeyboardpolicy="manual"?

So, edit this part:

<!-- Zone interactive -->
<input id="answer" type="text" placeholder="Tapez votre réponse" 
       virtualkeyboardpolicy="manual" contenteditable style="width: 100%; padding: 10px; font-size: 16px;">