If I only use Massive in one track of the project, I can later reopen the project without issues, but the problem is when I use Massive into different tracks. It doesn't matter if I use eco mode in all of these tracks. I can play the tracks but then Ableton crashes after 30sec-1 minute. One would think it is because of not having enough CPU-power, but it is a modern Xeon chip, and I use UA Apollo. Any ideas?