11-20-2018 03:50 PM
11-20-2018 11:54 PM
Hey there, ChristianHe!
Welcome to the Lenovo Community group!
As we were checking here, the ThinkPad Thunderbolt 3 Dock https://support.lenovo.com/us/en/solutions/acc100356?CID=ww:lenovosocial:20x9m6 is not compatible with the Lenovo Yoga 730-15IWL laptop, and that could be the reason why it is not working properly with the laptop.