i dont understand

me and my ex just recently split up 2 weeks ago. towards the end of our relationship we faced a lot of issues due to me falling into a depression after having an abortion. he was very supportive throughout the whole ordeal however we both agreed that we couldn’t continue our relationship due to the fact that we were both dealing with mental health issues which was causing us to argue almost daily. despite this, we ended on good terms and agreed to continue to be friends after a bit of space / no contact. however, just yesterday i noticed he has blocked me on instagram? i feel a bit bewildered by this because it happened out of thin air, i am not blocked anywhere else. does anyone know why he might have done this? my mind is running wild with possibilities