The page /admin/surveys/invite has no confirmation flash message after the form is submitted, even though SurveyProcessingComponent::setInvitationFlashMessages() is called.
It appears that something after the calling of clearSavedInvitations() is deleting the msgs without them being displayed.
This is not the case if invitations are saved rather than sent.
This is not the case for the /client-prefixed page.
The page
/admin/surveys/invitehas no confirmation flash message after the form is submitted, even thoughSurveyProcessingComponent::setInvitationFlashMessages()is called./client-prefixed page.