So, Sibelius feels the urge to reload ALL of my score's sounds pretty frequently. This is happening when I fool with something in the mixer or when I look at my playback devices window. Also, as you would expect, when I do an instrument change, sometimes Sibelius is compelled to reload everything.

The score I'm working on has a full battery (including five individual staves of cymbals -- don't ask), a full pit (2 v, 5 m, crot, glock, rack b), and piano and synth.

The mixer shows four instances of KP2 in use. Two instances are maxed with VDL sounds. The other two have only piano in one, and synth in the other.

On a side note, I'm having trouble with the Effects Bus even showing me any options, let alone letting me add something. I don't know if that matters, but it's definitely another topic for another day.

Some of the search results I tried yielded similar issues, but not exact. However, you may know of one that I missed.

I'm using Sib 5.1 and VDL 2.5 and if any other specs help, I'll let you know what they are.

Thanks for your help!