Some comments are not saved

Hi,

I have a very mysterious bug with the “comment” plugin: some comments are not saved - about 1 of 10 comments are lost.

I use
- Grav v1.7.25,
- Quark v2.0.4 (slightly adapted - CSS and templates) as theme
- Comments v1.2.8
- Form v5.1.4
on PHP 8.1.0 (I also tested PHP 7.4.25 - same problem)

In the template I have integrated the comments as follows:

{% if config.plugins.comments.enabled%}
{% include 'partials / comments.html.twig' with {'page': page}%}
{% endif%}

The comment fields are also displayed correctly and 9 out of 10 comments are correctly saved and the email is also sent. Only about 1 in 10 comments simply go away (not saved and no mail).

I’ve already checked logs from Grav and Apache, but there is simply nothing to be seen.

There were no unusual signs in my tests. They were structured as follows:
Test date // time // number
Test 30.12.21 // 19:52 // #01
…

Then some of them are missing.

Does anyone have similar experiences or a tip on how I can fix the problem.

Thank you for your support!