Stemming from a discussion I was having in the EastWest forums, I have just changed our metaframe template to initiated loading the two instances containing Play first and then the instances containing Kontakt. This seems to have remedied the issue for me for the time being (have only loaded the metaframe twice, but no crashes so far...)
If I have any more crashes or other issues I will certainly file a report directly with VSL support, thank you again!
Cheers,
Paul