Delay in releasing construction ability when cancelling building

[tintinhamans]

Prerequisites

• I have searched for similar issues and confirmed this is not a duplicate

Game Version

• Command & Conquer Generals
• Command & Conquer Generals: Zero Hour
• Other (please specify below)

Bug Description

Sometimes when cancelling the construction of a building, there is a delay before the construction options are available again.

Reproduction Steps

1. Construct a building
2. Cancel construction of the building
3. Observe the controls of the construction unit and see this behavior happen sporadically (attached video for clarity)

Additional Context

2025-11-07T172750_1.webm

[Mauller]

To me this looks similar to the units evacuating wreckage situation.

I think it all comes down to the state the unit is in while still moving, they don't change to a different state till they stop their current action or reach their destination.

So the worker was still in the "Im going to my destination to build" construction state.

[Simon-code87]

The 2nd worker also isn’t able to build a command center. For a short time, all buttons are disabled.

And the second worker is already near the supply depot, so the construction process starts right away. The bug probably doesn’t occur if the worker is still farther away from the construction site.

[WWB2-account]

To me this looks similar to the units evacuating wreckage situation.

I think it all comes down to the state the unit is in while still moving, they don't change to a different state till they stop their current action or reach their destination.

So the worker was still in the "Im going to my destination to build" construction state.

Can confirm, even from a not-so-techsavvy perspective this is what is happening. If the player throws down multiple scaffolds with one builder, this effect has a small chance to persist longer than what is shown above. I haven't been able to reproduce it consistently.

Luckily, you can completely avoid this if you just press "S" so the builder stops and all buttons become available again, just like how you would put up more scaffolds with one builder.

[Stubbjax]

I tried to investigate this a while ago but I couldn't get it to behave consistently. But now looking again, I've just realised it was because I was testing with a random army each time and I didn't apply the fix to both DozerAIUpdate and WorkerAIUpdate. 🤦 It happens when the builder enters the docking substate when it reaches the scaffold.