Why won't my MBP connect to Personal Hotspot via wifi? I have not been able to connect my retina Macbook Pro to my iPhone 5s Personal Hotspot since upgrading to OSX 10.10 (Yosemite).

While I can see the phone in the list of wifi APs under 
the "Personal Hotspot" sub-list, attempting to connect to it fails every time, even though the devices are only about two feet from each other.

• I attempted to "forget" the AP and re-add it, but this did not resolve the issue.

• My provider is Verizon.
Connected my laptop to a different Hotspot device, then back to my phone. Everything seems to work now. Very strange.