Just the point I’ve mentioned. I’ve added in a screenshot to my post so you can see the option. It’s probably a bug that the copilot chooses your departure…
You need to import the Simbrief flight plan in the FMC (you setup your Simbrief id in the FMC as well as the flight tablet). The tablet is used for Navigraph charts and importing weight and fuel amounts from Simbrief. The FMC is used to import the flight plan