The flavor you describe as a little numb, a little spicy, and crunchy may be due to problems with the preservation or cooking process of the flower matsutake mushrooms, or the variety of flower matsutake mushrooms itself has such a flavor and texture. If you have any concerns about the quality and safety of flower matsutake mushrooms, it is recommended that you do not consume them and contact the relevant authorities or the producer for a solution.
If you want to ensure that you are buying safe and reliable matsutake mushrooms, it is recommended that you choose to buy them from regular channels that have been tested and certified for quality, and that you check the shelf life and preservation conditions of the product to ensure that the product will be used within the safety period.