It was not the first time the two have squared off.
In fact, it wasn’t even the first time that Leavitt has denied Collins a follow up question.
It is a privilege to cover this White House" (viaYouTube).

She might be curt, but we have to admit,Leavitt is the queen of petty interactions.
She said the reasoning was a “brutal” work schedule that was “taking a toll.”
Donnelly’s departure was also reportedly sudden and unexpected.

The same source also mentioned rumors that the data pipe wanted Collins to solely work the White House job.
That could make for a turbulent work environment, especially if Collins was fighting to keep both jobs.