How to deal with a workaholic zealot coworker?

I work on a team of five in a corporate setting on an important, albeit non-critical application. We chug along adding features and making improvements, except for this one team member. She works 60-70 hour weeks, 6-7 days a week. For the three years I've known her, she has always been passive aggressive about my 40 hour work weeks, but I just try to ignore it. But obviously she does the same to the rest of the team, from which I have noticed an up tick in late hours, checking messages on the weekend, etc. Mind you she is not the team lead, but has affected the behavior of the team lead as well. Oddly, she is not any more productive than the rest of us, just constantly in a hurry and subtlety complaining about how much work there is.

I spoke to her almost a year ago about it in the context of work life balance, something that our workplace promotes. The conversation went no where but a few days later, I was spoken to by the team lead and asked why I was displeased with the zealot. I just repeated myself regarding work life and the conversation ended. But now as I said, the constant pressure of our team's workaholic is changing everyone. It creates stress where now needs to be. It cuts into all of our personal lives by needing to check messages and pull requests at all hours. And it is completely unnecessary.

What should I do?

PS – Don't just say find a new group. That's always an option, but the grass is always greener.