Hi!
There is some issue with calendar picker.
If calendar picker didn't fit under control it show up above it, but in case of insufficient space its draw partially outside of window.
Also on mobile devices even if disable header of calendar it is too big.
For screen sizes -md and smaller compact calendar style could be a better solution.
But now it is not existed.
Calendar picker
For the small screen devices, I planns add displaying as full screen modal mode