Spring configurations not auto updating

I am trying something new I saw on youtube that most of you probably already know about. Basically the height of my spring is being controlled by and in-context mate so when I switch assembly configurations the length will auto update. This works great in the assembly environment but the problem with this is after switching assembly configurations I have to hit rebuild before the spring will change. The bigger problem is when I create drawings of the assembly and need to show in both configurations the spring length will only display one length in both configurations.

I have checked some of the rebuild settings and they look good to me. Is this a known bug?

Thanks,

Matt Kirby

SW 2013 SP3

SolidworksAssemblies