Fresh installations emails broken with 1.3.0

Something similar has already been reported here: https://www.drupal.org/project/symfony_mailer/issues/3379690#comment-151...

BTW: Composer automatically uses 1.3 (supported) instead of 1.2.2 (recommended)!

All existing sites which composer upgraded to 1.3.0 are also broken now and the password forgotten emails for example don't have any value anymore. Setting priority to critical.

Is it possible to downgrade to 1.2.2 until this is fixed or are there database updates from 1.2.2 to 1.3?

Replying to myself in #3: Upgrading from 1.2.1 to 1.3 involves the following database updates:

symfony_mailer          10008       hook_update_n   10008 - Set initial
                                                      values for override
                                                      configuration.
  symfony_mailer          10009       hook_update_n   10009 - Disable the
                                                      obsolete module
                                                      symfony_mailer_bc.

And I was in luck to have that 1.2.1 installation, so I could test, if it breaks when updating to 1.3.0 and YES!
Before the update, the email subject and body were present
After the update, they are gone!

The worst part is, that composer updates to 1.3 from ^1.2 despite the not-recommended thing at Drupal.org. I don't think we can change this, so the bug itself needs to be resolved in 1.3.0

Perhaps 1.3.0 can be entirely unpublished until this is fixed, so other users don't run into the issue for now?

I just tried updating from 1.2.1 to 1.2.2: 1.2.2 still works totally fine! So the issue definitely is in 1.3.0!

FYI: I don't think #3379529: Disabled overrides should not cause conflicts but I tried if the patch fixes this issue as side-effect, but it doesn't.

I finally downgraded to 1.2.2 (as I use default configuration!) by

drush pmu symfony_mailer
composer remove drupal/symfony_mailer
drush cex -y
composer require drupal/symfony_mailer:~1.2.2
drush en symfony_mailer

Be careful, this will reset all settings to default, but use 1.2.2 which works!

So as there's a workaround by reinstalling (might fit for most users without special configuration), I'm setting priority to Major.

Hi @AdamPS, sorry for the confusion. We have both. Existing installations, which are working and fresh installations which are broken with 1.3. But what's for sure is, that there's trouble with 1.3 that wasn't there with 1.2.2. So we finally downgraded all projects, existing and fresh to 1.2.2.

The projects themselves were not fresh, but used Swiftmailer before. Please also see similar reports over here: https://www.drupal.org/project/symfony_mailer/issues/3379690

I don't know what should be specific in these projects. symfony_mailer is the only mailing module enabled on all these projects. And the issue appears with the core password forgotten emails for example (as simple test)

Most project are multilingual, but that doesn't seem to be related. The single-language projects are having the same issue with 1.3