Geocoder suggestions don't appear for UWP app in some environments

On UWP, typing into the search bar does not yield any auto-suggested results in some environments.
This prevents testing workflows such as routing and verifying the existence of a turn-by-turn locations screen.

**Note:** this appears to be specific to the UWP app and _only_ occurs in certain environments:
- Failed for Mike on a Mac running Windows under Parallels
- Worked for Mara on a Windows on a PC natively
- Worked for Rich on a MacBook running Windows under Parallels and natively
- Failed for Rich running Windows on a PC (HP Spectre XT) natively

On UWP:

Same workflow on WPF:

__Edit__ (Rich 4/4/18): Updated title and description to be more environment-agnostic - i.e. to specify that this issue is not limited to running under Parallels. Also listed all instances of the issue being tested and present or not present.