Problem description:

If more than one component is specified for the UI tests, tests for them start at the same time. That results in a situation where every test generates the same OAuth token - but it works just for a single login. This behavior causes one login to pass and all other logins to fail.

Possible resolution:

Implement a random wait before the login attempt, and if the login attempt fails, wait again and retry. If possible, the scale of a wait time may be dependent on the number of tests being executed (e.g. no wait for a single test).