First. Double time increases the speed of map by 1,5x, not by 2x.
Second. Ryuuta moves in 2x speed, so... PROBLEM?
EDIT 1: HalfTime decreases speed of map by 0,75x, not by 0,5x.
Ryuuta moves in 0,5x speed so many hyperdashes appear.
This is not a bug of speed. This is a bug of mods naming.
EDIT 2: DoubleTime needs double speed of reaction to catch even unvanished hyperdashes so most of them are uncatchable as player hasn't got enough reaction to it.
Second. Ryuuta moves in 2x speed, so... PROBLEM?
EDIT 1: HalfTime decreases speed of map by 0,75x, not by 0,5x.
Ryuuta moves in 0,5x speed so many hyperdashes appear.
This is not a bug of speed. This is a bug of mods naming.
EDIT 2: DoubleTime needs double speed of reaction to catch even unvanished hyperdashes so most of them are uncatchable as player hasn't got enough reaction to it.