Hi Roel
Interesting test! Since I have also a couple of dropouts I would be interested in further ideas. Does it happen with the additional commercial styles only, or also with own edited ones? I edited a couple of internal styles and load them permanently into memory. Since I only work with registries the edited styles don't need to be permanently in the memory. It takes a fraction of a second only to load them upon calling a new registry.
I'm quite interested if you come to further findings.
En schöne Sunntig!
Hansruedi