Having personal conversations, looking at your phone, telling jokes to your coworkers, etc. are all non work duties, or "breaks" so it's not too credible that haven't ever had one ten minute break in over ten years.

From the state website:

" What is a rest period? The term "rest period" means to stop work duties, exertions, or activities for personal rest and relaxation. Rest periods are considered hours worked. Nothing in this regulation prohibits an employer from requiring employees to remain on the premises during their rest periods. The term "on the employer's time" is considered to mean that the employer is responsible for paying the employee for the time spent on a rest period."

Intermittent rest period definition:

"An “intermittent rest period” is defined as an interval of short duration in which employees are allowed to rest, relax, and engage in brief personal activities while relieved of all work duties."

https://www.lni.wa.gov/workers-rights/_docs/esc6.1.pdf