Working remotely part of the year in AZ

With WFH rules becoming more lax, I was considering doing 2-3 months a year in AZ from my home state of WA. I work for Amazon (Based in WA) and would be working remotely. WA has no state tax, AZ does

 

As far as I can tell, I'd be considered a resident of WA for tax purposes, making me a "non-resident" of AZ which makes this line apply:

 

Nonresidents are subject to Arizona tax on any income earned from Arizona sources

 

It's unclear to me if income from my job in WA would be a "Arizona source".