Contact plugin's find method fails on WP8.1 with PENDING_OPERATION_ERROR

Contact plugin's find method fails on WP8.1 with PENDING_OPERATION_ERROR

Repro steps:
1. Create mobilespec app with latest contacts plugin included
2. Run mobilespec app on wp8.1 device/emulator and navigate to New-style tests -> Manual tests -> contact tests.
3. Click on Get phone's contacts

Expected:
Contacts data shown in status box. or 'No contacts found' if no contacts exists on device

Actual:
'Error 3' message shown in status box.