Thank you for your post and welcome to the Bose Community.
I'm deeply sorry to see that you are facing some connection issues between your SoundSport wireless headphones and your Surface Pro 6.
With Bluetooth connections to a computer, there are many factors that can cause some complexities. Therefore, I would recommend that you take a look at the following thread for a better understanding. Computer Related Informational Post.
If you are still experiencing some issues following on from this, I would like to invite members of the Bose Community to input their experiences and workarounds.
Let me know if you have any questions.
Charlotte G - Community Support
Feel more. Do more. Be more. Come check out my profile here. New to the community? Check out the Getting Started board. Help others find answers to your questions by clicking on 'Accept as Solution' at the bottom of a reply. If you see a post you like, make sure to give it a thumbs up!