Kontakt 6 crashing Reaper

[foca]

I have a project with Kontakt 6 in one track. It works fine but when closing the project and trying to reopen it it crashes.

If I open the project with plugins offline and then turn Kontakt online it works fine. So it seems the issue is just while opening the project.

Reaper version: 6.06/64 (also happened in 6.05)
OS Mojave

I'm attaching the crash report.
Thanks!
Matias