When I send an email to parents, an older message body gets sent. Even if I delete it and write a new message, the email received by the parents will be one from a few months ago. It doesn't matter how often I change the message body. The subject changes, but not the body.
I've tried to disable the template plugin, but the result is the same. When I go back to the email parents programme to write a new message, the body field is filled by the old message again. Deleting that, and typing a new message, has the same result.
Everything works fine if I send an email to students.