You can see in the Test Server example that neither screen is accurate.
On the left its business as usual
On the right, both animation weights appear to be set to 1 (with the Down animation taking priority due to being play second)
This issue is still very much affecting developers today, preventing me from being able to implement directional movement animations through blending walk cycles.
As many games are working around this issues by creating their own replicating systems, or even resorting to semi-custom characters, it would be fantastic if this is looked into. Especially since @Davidii worked on a solution in the past and the Speed property of animations does replicate correctly, which is nearly identical in the ways of interaction and replication.
Upon further investigation I found out that there is one working way to replicate the weight of animations to other clients:
Play animations with a weight of 1 (not 0)
Ensure AdjustWeight never sets to 0 (0.01 at minimum)
The issue seems to be related to other clients stopping animations when Weight is set to 0. By using this workaround you can achieve your desirable effect until Roblox fixes this issue.
Here is another bug report about the 0-weight issue specifically:
This is still extremely frustrating and affecting development. At times, the replication of animations is seemingly random – I have 4 different animation tracks with the exact same asset id; when the weights are changed to different values, only one animation actually replicates to other clients. Even when one animation is then returned to a weight of 1, and the other animations to a weight of 0.01, the animation will still not play on other clients. There is seemingly no method to the madness.
This problem can be alleviated by using different asset ids (even if the actual animation is exactly the same). This sort of unexpected behaviour should not be happening, especially when you can break the replication of Roblox’s own default character animation script by simply setting the asset IDs of the walking and running animation to the same asset.
I just encountered this issue today. Can confirm that AdjustWeight does not replicate, and it has ruined my plans for the game I’m making. I’m gonna need to restructure a few things to work around this.
Animation replication in general is in serious need of improvement. Setting any animation-related property at runtime is a hassle. It would be amazing if after all these years, this were to be finally fixed.
Unfortunately, this is still an issue even with the new animation weighting update. Animations that are constantly updated to a weight of 0 can cause issues upon the rig. Issues such as the entire rig disappearing or the other animations without a weight of 0 not playing.