Device:
Xiaomi Redmi Note 4X Snapdragon

I can't make testfor trigger by looking at certain rotation.

As you can see on the screenshot I provided, I have set RY Min to 140 and RY Max to 220.
It shows up "Rotation out of range". The RY rotation can't exceed more than 180.

I changed the RY Max to 180, it works without any issue, but that's not i wanted for.
Setting RY Min to -140 and RY Max to 140 would make the command block get triggered even when the player is not looking at the look-at-trigger.

Is it a bug or is it just me doing it wrong?

It works fine with v1.1