Sending input over the network, press is somehow arriving faster than release.

I have these two functions, CmdForward and RpcForward, you can view them here(like 6 lines of code):

Code (CSharp):

1. [Command(channel = 3)]
2.     void CmdForward(int newForward) {
3.         RpcForward(newForward);
4.     }
5.     [ClientRpc(channel = 3)]
6.     void RpcForward(int newForward) {
7.         if(!isLocalPlayer) {
8.             forwardSync = newForward;
9.             forward = newForward;
10.         }
11.     }

(channel = 3) is set to Unreliable Sequenced When I press W forward is set to 1 on the clients almost instantly, but when I release W which uses the exact same function to set forward to 0, there is a long delay before 0 is set. If I hold forward for around 2 or more seconds before releasing, then the release message is received instantly like the initial send.

 

I've been at this issue for 10+ hours and solved it and am happy I solved it, but upset at how simple the solution was.
CustomNetworkManager.maxDelay...that is all

 

I googled around for a minute to see why this was happening (for my own education) and I can only see CustomNetworkManager as part of Unity's deprecated UNet. Are you building a new game on top of Unet or is this class also in one of the other frameworks?