Have you tried the sony site? Have a look through their FAQ's it might be a known problem. There might also be some software from sony if your keyboard has any special functions. Have you tried removing it and reinstalling again?
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation techniques
How to mine Bitcoin on Mac
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.