Israel broke the ceasefire first by continuing to occupy the Bekaa valley and Lebanese land all the way up to the Litani river. When they showed no signs of leaving, Iran said that Israel's breaking the ceasefire and that's when mango Mussolini announced the blockade.
Iran can't even tell Hezbollah to stand down because the group was already extremely weakened after the October 7 war and the death of Haniyeh.