1.15a animation

[Tsin]

in 1.14a and lower when player stands on start line animation is stoped (thats good)

in 1.15a when a player stands on start line animation starts and stops what causes EYE CANCER

:D)

[east]

The Envelopes are synchronized by the round start time so they get reset on entering the startline. That causes the flickering.
A simple solution would be to synchronize the envelopes by the current game tick.