DAV: Share invitation status does not change after accepting

[alecpl]

After I successfully do

POST: https://demo.domain.tld/dav/notifications/user/[email protected]/7c7efcec-f2ed9e2c-8ae8a537-90b2d644.xml

<?xml version="1.0" encoding="utf-8"?>
<d:invite-reply xmlns:d="DAV:">
  <d:invite-accepted/>
</d:invite-reply>

the notification status does not change. It stays at invite-noresponse:

GET: https://demo.domain.tld/dav/notifications/user/[email protected]/7c7efcec-f2ed9e2c-8ae8a537-90b2d644.xml

<?xml version="1.0" encoding="utf-8"?>
<CS:notification xmlns:CS="http://calendarserver.org/ns/">
  <CS:dtstamp>20240321T123507Z</CS:dtstamp>
  <CS:invite-notification>
    <CS:uid>7c7efcec-f2ed9e2c-8ae8a537-90b2d644.xml</CS:uid>
    <D:href xmlns:D="DAV:">/dav/principals/user/[email protected]/</D:href>
    <CS:invite-noresponse/>
    ...
  </CS:invite-notification>
</CS:notification>