@ParmuTownley Its been in multiple smaller websites and publications for a long time:

https://www.makeuseof.com/tag/3-ways-bluetooth-device-security-risk/

Forum posts:

https://security.stackexchange.com/questions/100443/security-of-bluetooth-low-energy-ble-link-layer-encryption

And its even made its way to major news publications, albeit in a slightly incorrect and downplayed fashion:

https://www.wired.co.uk/article/bluetooth-update-security-how-to