Q: Wifi issue on OS X 10.10.1. macbook pro

Device:      Macbook pro 13"

processor:  2.3 Ghz , i5

Memory:     4 GB

OSX :         10.10.1

Wifi does not restores when my macbook restarts from sleep mode.

wifi icon stays grey. and macbook does not connects to any previously stored wifi network.

I need to restart the Macbook, then only it connects to Wifi network.

Can Anyone help?

there was no wifi issue on any previous OS X ,

some Bug in Yosamite.

Dear Apple: Please fix it.

Thank You.

Chetan Makwana