Potion with any other effect durations or their levels turns into uncraftable potion when changing it to splash or a lingering potion

1. /give @p potion{CustomPotionColor:8171462,display:{Name:'[

{"text":"Potion of Speed 1","italic":false,"color":"#7cafc6"}

]'},CustomPotionEffects:[\{Id:1,Duration:3100,Amplifier:3}]} 1

2. Convert it to a splash potion

3.  It turned into an uncraftable potion instead of keeping its effects.