RadProgressArea bug???

[zxc ccc]

On my aspx page i use RadProgressArea, and manual update progress, using code below

 protected void buttonSubmit_Click(object sender, EventArgs e)
        {
                RadProgressContext context = RadProgressContext.Current;
                context.SecondaryTotal = value;
                context.SecondaryValue = value;
                context.SecondaryPercent = value;
        }

So, if i click submit button, and try to update progress on several pages, all pages use same RadProgressContextm and i see rubbish in progress area (percentage jumps forward and backward).
Any workaround for this bug?