Connect App not reloading

I’m creating a Connect App, and followed the instructions and was able to get an item added to the Project Sidebar once. But after I changed the .html with something other than display “My Project Page”, Jira doesn’t seem to be “reload/refreshing/pulling” the contents from my local server, even after uninstall/installing.

Changing the contents of the atlassian-connect.json file is reflected in the Jira UI (sidebar), and the http-server logs shows it doing a “GET /atlassian-connect.json” during the install.
But the log only showed the one time it did the “GET /project.html?projectKey=xxxxx”


 "jiraProjectPages": [
                "key": "hello-world-project-page",
                "name": {
                    "value": "Test Importer"
                "url": "/project.html?projectKey=${project.key}",
                "iconUrl": "/images/icon.png",
                "weight": 1

<!DOCTYPE html>
<html lang="en">
        <link rel="stylesheet" href="" media="all">
        <script src="" async></script>
        <section id="content" class="ac-content">
            <h1>My Derpy Page</h1>

Shouldn’t uninstalling/installing the app force Jira to refresh its page?
The tutorial at doesn’t describe the development lifecycle, like its describe for Forge apps (e.g. forge tunnel ). What is the proper way to update after changing html?