Thanks for contacting us. Sorry the dock seems to be affecting Wi-Fi when plugged in.
May I ask you to check to see if you have the latest wireless card drivers installed for your Yoga and if not update them to the latest? We have seen a few instances where updating the Wi-Fi drivers helps. If you let me know what model Yoga you have I should be able to find a link to the latest driver for you.
If that does not resolve the issue, please send an email to email@example.com and reference ticket 81129 in the subject line and we will be glad to help!