According to the WSJ, Musk ordered the limitation of the Starlink system's speed

Elon Musk ordered a speed restriction on Starshield, the military version of Starlink used by Ukraine, causing operational delays. Ukraine reported system slowdowns on October 14, impacting military hardware connectivity. The restrictions were discussed with Donald Trump and U.S. officials prior to implementation. Analysts link these limitations to a U.S.-Russia diesel agreement, which has led to a suspension of new sanctions against Russia. Critics argue that the UK and EU fail to make necessary sacrifices for Ukraine's victory.