CorelDraw consistently crashes every time I try and drag a colour onto or off the custom RGB palette...

CorelDraw consistently crashes every time I try and drag a colour onto or off the custom RGB palette that I have created.
I have been working around this, but I would like to be able to use it for example with the gradient tool.

It happens every single time time without fail, so it looks like a bug.

I have a legitimate copy of X7.
Is there a workaround?

Thanks!

Leslie