Hi Mike,
Thank you.

We are doing well. I hope you and your family are safe.

Please replace your display name filter

function my_bp_displayed_user_fullname() {
	global $bp;

	return $bp->displayed_user->userdata->user_login;
}
add_filter( 'bp_displayed_user_fullname' , 'my_bp_displayed_user_fullname' );

with this

function my_bp_displayed_user_fullname( $name ) {
	return bp_get_displayed_user_username();
}

add_filter( 'bp_displayed_user_fullname', 'my_bp_displayed_user_fullname' );

That will fix it.

Regards
Brajesh

Hi Nabha,
Thank you.

I will check it today and will get back to you in next 24 hours.

Regards
Brajesh

Hi Nabha,
Thank you for the topic and reporting the issue.

Can you please ask the developers of buddypress-group-email-subscription if there is any way to skip some activities(any filter).

Please let me know their suggestions and I will add compatibility.

Regards
Brajesh

Please try adding this to your bp-custom.php

add_action( 'wp_footer', function () {
	?>
	<script type="text/javascript">
        jQuery(document).ready(function ($) {

            if ($('#send_message_form #subject').length) {
                $('#send_message_form #subject').val('Some message subject');
            }
        });
	</script>
	<?php
} );

Let me know if i works or not?

It assumes that the theme loads jQuery.

Regards
Brajesh

Hi Carsten,
Like I said earlier, It is very much dependent on the theme.

For example, if you check demo of our Community Builder theme, we have removed it.

We will not be able to assist with your theme and will suggest asking your theme developer for the guidance.

Regards
Brajesh