Glitching sidechain compressors, is this common for everyone?

I'm waiting for a plane and browsing this forum and it has finally occurred to me to post on this common issue for me. 

I generally have two or three tracks associated with bass guitar. I'll have an amp, a DI and sometimes a an alternate input of some kind like a sansamp. They are usually all sent to one bus where I will have a sonitus compressor setup to be keyed by the kick. Sometimes this setup works just fine and I can open and close the project without issue. Other times when I re-open the project the bass will be all grumbly and glitchy sounding. If I solo to bass bus I can hear the heavily messed up sound playing back. If I open the compressor on the bus and click the button that toggles between Audio and Input (I think) it will play back this totally fragmented non-musical sound of bleeps and bloops and spits and pops. When I toggle back and and restart the playback everything will be fine from there.

It has done it on Sonar 8.53 Producer and X1 Producer Expaned for sure. I am running X1 now. I can't remember when I started noticing it but it's been happening for at least two years or more. I've never complained because the workaround is only a minor inconvenience. 

I have had this problem with several interfaces including MOTU, M-Audio and Tascam.
I am running Windows XP SP3

This is the only compressor I use for Sidechaining and it seems to only happen between the kick and the bass but not with other instruments. Sometimes I will trigger directly from the kick track or from a bus that the kick is feeding. I will sometimes key a sidechain on other instruments from the lead vocal or something like that and I don't have the problem there. The only thing I can think of that I do differently with the kick/bass sidechain and I generally set the attack 0ms where on other cases I will have a slower attack time.

Okay, my flight is about to board so maybe I will arrive at home with a solution, explanation or comiseration awaiting. 

Cheers, William

Doesn't matter where the solo initiates from, Bus or Track, one of the group or all, the glitching continues until I monitor the key input through the compressor and then switch back to audio. Once I do that all is fine for the rest of the session. Once a project does this it will always do it when I first open it. Occasionally I can fix it by creating a new bus and moving rerouting things, sometimes it doesn't fix it.