Current work around is ensure your simbrief plan is loaded into the inibuild manager, and exported.
I was crashing MSFS every time I loaded NZAA/YBBN, but was ok with all the other airport combos. At the time my simbrief flight plan was NZAA/YBBN, but it wasn’t loaded into the inibuild manager. It will crash MSFS with whichever airport combo you have in simbrief.
The current simbrief import doesn’t work for me, stuck on pending when I have my username in.