This would be odd that every blend created with Perique in various ways, that they would all cause this.
Have you seen this article on Perique?
Perique is an incredibly versatile blending component and one of the most interesting and complex types of tobacco.
www.smokingpipes.com
As an example, while you could have several blends using Perique all from St. James Parish, the way in which they are processed with the blenders does change their profile/character to various degrees.
But maybe at the heart of it, simply smoking a fermented blend like this, no matter how it’s been processed bothers you.
Have you ever smoked Germain's Royal Jersey: Perique Mixture?
For anyone facing issues with various styles/blends they like, the Germain’s line of tobaccos are extremely subtle easy on the mouth.
I’d be curious to know if you also experience the same, with this blend.