Particle.connect() blocking main loop permanently, even with SYSTEM_THREAD(ENABLED)

Troubleshooting
21

I’m still a bit confused as what is said in this thread doesn’t seem to match the docs.

In the docs under System Threads / System Functions it says in SYSTEM_THREAD(ENABLED) mode only the following system functions block the caller:

  • WiFi.hasCredentials(), WiFi.setCredentials(), WiFi.clearCredentials()
  • Particle.function()
  • Particle.variable()
  • Particle.subscribe()
  • Particle.publish()

But the thread above talks about Particle.connect() blocking even with SYSTEM_THREAD(ENABLED). Can someone in the know be specific about under what circumstances (and if specific on what boards) Particle.connect() will not block.