Rewatching the episodes and there's some subtext about the state of Sabine mental/emotional stale and her relationship to Ahsoka that's suddenly jumping out at me.
First off; Sabine's clearly not living her own life, but instead attempting to inhabit the empty husk of Ezra's. She's living at his old squat when she could just as easily have gotten a nice city apartment or an isolated farmstead out on the plains if she wanted. She's surrounded by his old stuff, and even wearing his colours. This feels like she's punishing herself.
For Rebel's fans, it's pretty evident that Sabine is in some sort of slump. She clearly hasn't 'moved on' from the events of the Rebels finale. Until she cuts her hair, anyway. That scene was somewhat reminiscent of Kanan's actions before he sacrificed himself to save Hera and the others.