Hi,
Sorry for the delay in getting this answer. We are preparing a new release for the SimBrief integration due to this issue.
There was a similar question, where you can download a first “beta” to see if it solves your issue:
I have tested your scenario with the next app, and here, the whole flightplan was imported:
We are still testing a few things but will release this version soon.
I hope that helps
Richard