@SirKruber Thank you very much for your reply. I was playing Warhammer: End Times - Vermintide (and what a great game that is, too!) earlier this year alongside Vermintide 2. What is really interesting (or peculiar, in this matter) is that on Vermintide’s 2 add-on pane (within the PS4 menu) it lists not only Winds of Magic (the only Vermintide 2 add-on I purchased) , but all the previous Warhammer: End Times - VermintideVermintide add-ons.
I think I’ll wait for the topic to be acknowledged before submitting a support ticket, so as to avoid making a double post.