Spintax links preview OK, sent mail shows ALL variations

My workaround is just not to spintax links (& linked text).... bug or feature?
I would appreciate it if you could kindly provide additional details to further clarify your question. As of now, I'm unable to fully comprehend the nature of the issue you are facing. Please provide more context and specific details regarding the behavior you are experiencing, including any expected outcomes. This will enable me to offer you a more accurate and comprehensive response. Thank you for your cooperation and I look forward to assisting you further.