1.3.7rc3 does not pick up cookies

[pmeier]

import panel as pn
import param


class AuthPage(pn.viewable.Viewer, param.Parameterized):
    js = param.String(default="")

    def __init__(self):
        super().__init__()
        self.cookies = pn.pane.HTML("")

    async def login(self, event):
        self.js = f"document.cookie = 'foo=bar';"

    @pn.depends("js")
    def run_js(self):
        return pn.pane.HTML(f"<script>{self.js}</script>")

    async def refresh_cookies(self, event):
        self.cookies.object = str(pn.state.cookies)

    def __panel__(self):
        return pn.Column(
            self.run_js,
            pn.widgets.Button(name="Login", on_click=self.login),
            pn.widgets.Button(name="Refresh cookies", on_click=self.refresh_cookies),
            self.cookies,
        )


auth_page = AuthPage()
auth_page.show()

Below are two screencasts with panel==1.3.6 and 1.3.7rc3 that perform the following steps:

1. Run the script above.
2. Check the document.cookie attribute in the browser console and make sure it is empty
3. Press the "Login" button
4. Check the document.cookie attribute again and make sure it is set to foo=bar
5. Refresh the page to send the cookie to the panel application
6. Click the "Refresh cookies" button to display the dictionary of available cookies
7. Check the document.cookie attribute again and make sure it is set to foo=bar

1.3.6

1.3.6.webm

1.3.7rc3

1.3.7rc3.webm

Although the procedure is exactly the same, the cookie is not picked up by 1.3.7rc3 despite it being available in the browser console.