Thanks for your review here Viliam.
What you note is not okay, I checked and see you were not in touch with out customer care team about this.
We would like to invite you to do so through the Live Chat or email at love@jimmyjoy.com so we can follow up on this for you. It could be due to a temporary ingredient change for the oats we had for selected batches a while ago.
We hope to speak with you soon.