X3, no sound= bug?

On occasion, I'll upon a project in X3 and there is no sound. It has to do with an effects bus. I can undo the effect, then I get sound. I can delete it then put it back, and all is fine. Is this a known bug in X3 (Studio). It doesn't seem to matter what project or bus I use, it seems to randomly happen after I open 5-6 charts. Has anyone else experienced this? Thanks.

Definitely not a known bug that I'm aware of. Alex (forum host) keeps a list of known and user repeated bugs.

Cakewalk itself keeps a list of items in development but it includes on-going development efforts and so is not public.
 
Do you ever have the problem if you press E to bypass all FX?
 
Which effect is causing it.
 
Sometimes, unlicensed/demo fx have a built in 'feature' to interrupt audio after the demo period expires. This can be pretty aggrevating, especially if you believe it should either still be working in demo mode or don't realize it's a demo.
 
This year, I bought a large set of plugins from Nomad and they included demo plugins with my install package that were demo, that were not included in my purchase and I could not choose to not install. If I wanted the plugins I paid for, I had to let them install ad-ware.
 
Pretty cool, huh?
 
Now, if your effect is the Concrete Limiter, there were cases a long time ago where that bad boy would mess up and prevent sound going through even though it was properly installed etc. etc. I believe that bug has been fixed for a long time, though.
 
Which version of X3 are you on?

Thanks for the responses. I'm up to date with X3e, have only had it a few weeks. No error message. I have Boost 11 on the master (It's temporary for me), and I haven't tried the FX bypass yet. It's usually a reverb effect and it doesn't seem to matter what kind (Nomad, Sonitus, 3rd party) etc. It's odd. As I said, just turning the reverb off restores sound, and then I can delete and re-install it, but it's more of a nuisance than anything else. 

Thanks. I'll watch it and see if I can come  up wit more info i.e. patterns of when this behaviour happens. Yeah, I don't plan on living with it.  I'll try and get more info before I call so that I can get a solution. 

THanks. The computer is only 1 month old, so there has been very little as far as demos etc, in fact none.  Other than this problem it seems to be running great. Windows 8.1 i5 3.2 ghz, 8 gigs RAM, so I don't think there is anything wrong there. I've been using Cakewalk since the midi-only days so I doubt it's me, but one never knows. 

Interesting, I use it every day and haven't had the issue in years. Just getting lucky I guess.

I guess I don't use PC Presets much on the main bus. I usually drag my Plugins from the browser into the Pro Channel. I just right click to add the CL.
 
The FX I pick on any given project are so varied and randomly picked. I just go rooting around in the arsenal for things that might fight the jam and start tweaking them.
 
I just went to try to repeat it and GOOD GOLLY THERE ARE A LOT OF PC PRESETS IN THERE! THANKS CRAIG!!
 
I should add, I totally believe you. If support says it's a bug, it must be. I wasn't able to repeat just now but... shrug.