Also note that as the approach phase activates, speed reduces which can easily put you high especially if ATC give you track shortening. This problem is more noticeable when you are light and the approach speed is low, there is a big speed reduction from the typical 220kt range you are normally doing when approach phase activates to come back to green dot.
Selected speed may be needed to ensure you stay on profile. 220kts is a good speed in the A320 as you will usually be able to take half speed brakes and not infringe on VLS. Flaps 1 can be selected and the speed reduced to 190kts, stow the boards, take Flaps 2 and you are well set up for the approach.