I am an instructor of an IoT course. We had issues with connecting to the Particle Cloud with the 2.x.x on our college network, so support.particle.io had us manually upgrade to Device OS 3.0.0 on our Argons.
Today we noticed that analogWrite no longer seems to work on Argon pins A4 and A5. Works fine with older Device OS. Going to the particle docs, we noticed that Pins A4 and A5 are not listed in the text as PWM pins, but they are included in the bullets for Group 2.
I was not sure the right mechanism for reporting this observation.