SharpHook: Getting false positives for 'Alt' key.

We have a piece of software that tries to listen to certain key combinations. When we use the ‘Alt’ key in version 5.x, it sometimes gets stuck in the ‘pressed’ state and stay that way until we manually press it again. This issue didn’t happen with version 4.2.x.

        private void OnKeyPressed(object? sender, KeyboardHookEventArgs args)
        {
            // [...]
            if ((args.RawEvent.Mask & ModifierMask.Alt) > 0)
            {
                // this gets here even when alt is not pressed down.
            }

Our full implementation of the class is here.

I have tried to comment out pieces of code to get to the bare minimum and the false positives appear to stay there. Then when I ‘spam’ the alt key to kind of unstick it, keybinds work as expected.