I have experienced a bug many times where there is still a skosh of time left on the rope when I complete my move, yet the server rejects it. Here is proof.
My ping to the Duelyst server is less than 25ms.
The issue here is cosmetic but feels very bad. The best solution (in my opinion) would be to tune the rope visual so that there is a bit of a buffer so that any move input just as it ends has enough time to reach the server given the average player’s ping such that it will not be rejected.