Minecarts slow on accelerating blocks

[Bloodlex]

Hey, after a new update my minecarts are sometimes slow, although they are on accelerating blocks (in Craftbook). It worked in earlier version... could you please take a look on that? 🙁

[Xericore]

Hi. What do you mean with accelerating blocks in Craftbook? Could you post a picture please? What do you mean with "sometimes".