Retraction
It appears that they postponed gear retraction. So maybe they knew right away that there was something wrong. Could be through tire pressure, maybe through tower/ATC.
You have to land anyway, so good decision to continue and land with less weight and less fuel. The decision that comes before that decision is whether you should retract. Because retracting a blown tire can damage the interiors of the wheel well. Due to debris or do to hight temperatures/ wheel well fire.