Two days ago the influential Culinary Union in Nevada released a statement attacking Medicare for All. Bernie supporters rected angrily online to this statement. I didn't go digging but the main responses were pointing out that high-ups in the union were also in high positions in the Clinton-founded think tank, CAP. I couldn't see any harrasment beyond this pointing out of a fact, but I wasn't looking. Anyway there was no response by the 2 campaigns which ostensibly support M4A - Bernie or Warren - other than some rebuttal from Bernie surrogates on TV interviews.
The next day the Union put out a statement condemning Bernie bro online harrasment. About an hour later, the Biden, Klobuchar, and Warren campaigns put out near-simultaneous, near-identical statements condemning Bernie supporters' harrasment.
So let's sum this up. Warren's healthcare policy, an area where she is becoming increasingly hazy, is attacked by a union on false grounds. She chooses to stay silent on this signature issue. The union then condemns online harrasment by a "fellow" supporter of M4A. Warren now does release a statement, very likely coordinated with other campaigns which oppose M4A, backing the union on this.
You can draw the conclusions you like, I think her priorities are clear.