According to an official Ukrainian military statement, Ashton-Cirillo's recent statements regarding "hunting down" dissidents and "propagandists" were not approved...
As we detailed below, Ashton-Cirillo had within the last days been in a verbal fight with influential Republican Senator J.D. Vance.
Given the "hunting down" video had been online for well over a week, and Kiev did nothing, the timing of the suspension by Ukraine's military seems more out of concern for Zelensky's lobbying efforts in D.C. than anything else.
Zelensky is about to visit the White House, and will also seek to lobby GOP holdouts and fence-sitters in Congress to approve billions more in defense aid for Ukraine. This is likely the real reason for Ashton-Cirillo being dismissed: Zelensky didn't want the controversy hanging over his head in Washington, especially after Sen. Vance wrote a letter demanding answers to top White House defense and intelligence officials.