MOTU and WIFI Issue

Hi there.
I recently upgraded from Mountain Lion to Yosemite hoping to resolve this issue but unfortunately it's still present.
Basically If I let the wifi ON during my Ableton sessions the sound starts crackling after 20 or 30 minutes, like the cpu usage was at 100%. The funny thing is that everything turns normal if I click the wifi icon on the finder bar. Just by clicking it and showing the wifi menu the crackling will go away.
Are you guys having this kind of issues with MOTU or any other external audio cards?

The only thing I can think of is changing your wireless adapter.

I picked up that broadcom unit you can get off eBay and wireless and BT work great. No MOTU units here, but firewire Steinberg and TC Electronic and no odd issues, even after hours of work.