SearchBarAnimation.js

_updateScroll = ({value, manually}) => {
  if(value && manually) {
   this._clampedScrollValue = value;
  } else {
    const diff = value - this._scrollValue;
    this._scrollValue = Math.max(value, this.topPartHeight); // Fix normal state
    this._clampedScrollValue = Math.min(
      Math.max(this._clampedScrollValue + diff, this.minClamp), 
      this.maxClamp
    );
  }

  this._changeStatusBarStyle();
  this._changeStateBar();
};

onTabPress = (route) => {
  let type = this.stateBarTypes;
  let offset = (this.stateBar == type.NORMAL) ? this.topPartHeight : 
               (this.stateBar == type.CLAMPED) ? this.maxClamp : 0;

  this.initialState.scrollToOffset({
    offset: offset,
    animated: false,
    tab: route.key
  });

  this.scrollY.setValue(offset);
  this._createClampedScroll();
  this._updateScroll({value: offset, manually: true});
}