Yes this is expected behaviour. (It did this in the past too even with low Agility)

It will regen even 1 energy and use that to run with the run toggle is on. So thats why youre getting those small bursts.

It could also be that regen is not correctly syncing up again.

I'm sorry; its different than what it was on old client but still expected behaviour seeing how the logic correctly functions I guess.

Interested to see what the fix will be

But the server probably sends out the regen and subtraction at the same time and does not null each other out, so regen probably sends after subtraction, or at the same time and doesn't handle both like that. And if server only sends regen amount to client every second, then you have a full second to use before it fixes that tiny amount.

But also, I dont have the code in front of my face, so this is all speculation : D

Im not sure this is so much a bug, but a fluidity of gameplay annoyance. But well worth noting and pushing a fix for. Maybe IF energy depleted, turn run toggle off.

Maybe something like this?

class Player {
private:
    bool isRunning;
    int runEnergy;

public:
    Player() : isRunning(false), runEnergy(100) {}

    void toggleRun() {
        isRunning = !isRunning;
        std::cout << "Run toggled " << (isRunning ? "on" : "off") << std::endl;
    }

    void updateRunEnergy() {
        if (isRunning) {
            runEnergy -= 1;
            if (runEnergy <= 0) {
                runEnergy = 0;
                if (isRunning) {
                    toggleRun();
                    std::cout << "Run energy depleted. Run automatically turned off." << std::endl;
                }
            }
        }
    }

    void displayStatus() {
        std::cout << "Running: " << (isRunning ? "Yes" : "No") << std::endl;
        std::cout << "Run Energy: " << runEnergy << std::endl;
    }
};

int main() {
    Player player;
    
    // Simulate running until energy is depleted
    player.toggleRun();
    for (int i = 0; i < 105; ++i) {
        player.updateRunEnergy();
        if (i % 10 == 0) {
            player.displayStatus();
        }
    }

    return 0;
}

It will regen even 1 energy and use that to run with the run toggle is on. So thats why youre getting those small bursts.

It could also be that regen is not correctly syncing up again.